diff --git a/.github/env_specs/lab3.yml b/.github/env_specs/lab3.yml
index 7337588d..325b2f23 100644
--- a/.github/env_specs/lab3.yml
+++ b/.github/env_specs/lab3.yml
@@ -5,7 +5,14 @@ channels:
   - nodefaults
 
 dependencies:
-  - ipywidgets >=7.6,<8.0.0a0
   - jupyter_server >=1.2,<2.0.0a0
   - jupyterlab >=3.0.0,<4.0.0a0
   - jupyterlab_server >=2.0.0,<3.0.0a0
+  # next roadmap item
+  - ipywidgets >=7.6,<8.0.0a0 # ...with whatever version of...
+  - voila >=0.2.6,<0.3.0
+  # ... jupyterlab_widgets     # it brings along
+  # incubator: for installability issues, demo purposes)
+  - jupyterlab-classic >=0.1.0,<1.0.0a0
+  # developer experience stuff
+  - jupyterlab_robotmode >=0.2.0,<1.0.0a0
diff --git a/.github/locks/test/linux-64/py3.8/lab3/conda.lock b/.github/locks/test/linux-64/py3.8/lab3/conda.lock
index f84d046e..020c1357 100644
--- a/.github/locks/test/linux-64/py3.8/lab3/conda.lock
+++ b/.github/locks/test/linux-64/py3.8/lab3/conda.lock
@@ -1,5 +1,5 @@
 # platform: linux-64
-# env_hash: f424393e2aa5109e787bb6551a9e07dc6594d8c56cc7c727584abc9d921665d6
+# env_hash: 4b4372af7b75c77a6978bf723f696e214eed253f9618cbaf23b1c7d01fd67cea
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
 https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
@@ -37,6 +37,7 @@ https://conda.anaconda.org/conda-forge/noarch/entrypoints-0.3-pyhd8ed1ab_1003.ta
 https://conda.anaconda.org/conda-forge/noarch/idna-2.10-pyh9f0ad1d_0.tar.bz2#f95a12b4f435aae6680fe55ae2eb1b06
 https://conda.anaconda.org/conda-forge/noarch/ipython_genutils-0.2.0-py_1.tar.bz2#5071c982548b3a20caf70462f04f5287
 https://conda.anaconda.org/conda-forge/noarch/json5-0.9.5-pyh9f0ad1d_0.tar.bz2#10759827a94e6b14996e81fb002c0bda
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab_robotmode-0.2.0-pyhd8ed1ab_0.tar.bz2#d47faff8538311d7e67e8ab89d8a7c4e
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab_widgets-1.0.0-pyhd8ed1ab_1.tar.bz2#f8da92114c8fbe1d951b0efaf54dd14b
 https://conda.anaconda.org/conda-forge/noarch/nest-asyncio-1.4.3-pyhd8ed1ab_0.tar.bz2#a1f2fda4d88c624810bf2029aa4c0827
 https://conda.anaconda.org/conda-forge/noarch/pandocfilters-1.4.2-py_1.tar.bz2#ba6f4a308f1ea22abe1d72e72544af76
@@ -69,7 +70,7 @@ https://conda.anaconda.org/conda-forge/linux-64/pyinotify-0.9.6-py38h578d9bd_100
 https://conda.anaconda.org/conda-forge/linux-64/pyrsistent-0.17.3-py38h497a2fe_2.tar.bz2#239e9357764e43276e8e80e65535b46f
 https://conda.anaconda.org/conda-forge/linux-64/pysocks-1.7.1-py38h578d9bd_3.tar.bz2#8284bab4783fd6fdd11b695958945614
 https://conda.anaconda.org/conda-forge/noarch/python-dateutil-2.8.1-py_0.tar.bz2#0d0150ed9c2d25817f5324108d3f7571
-https://conda.anaconda.org/conda-forge/linux-64/pyyaml-5.3.1-py38h497a2fe_2.tar.bz2#210cde5d6a3c41698f3a68620af9c4fa
+https://conda.anaconda.org/conda-forge/linux-64/pyyaml-5.4.1-py38h497a2fe_0.tar.bz2#36d6e06148013694eb943576cd305f67
 https://conda.anaconda.org/conda-forge/linux-64/pyzmq-21.0.1-py38h3d7ac18_0.tar.bz2#6917a82feefaae55bbcea6ff95813037
 https://conda.anaconda.org/conda-forge/noarch/robotframework-pabot-1.10.1-pyhd8ed1ab_0.tar.bz2#ae21522f8d111b5568b30d5e264e6093
 https://conda.anaconda.org/conda-forge/noarch/robotframework-pythonlibcore-2.2.0-pyhd8ed1ab_0.tar.bz2#29a329f0b817038d27d7bdfb2ca04b5a
@@ -82,11 +83,11 @@ https://conda.anaconda.org/conda-forge/linux-64/brotlipy-0.7.0-py38h497a2fe_1001
 https://conda.anaconda.org/conda-forge/linux-64/cryptography-3.3.1-py38h2b97feb_1.tar.bz2#f27d2f43f9e585b6d8bfdb915051b109
 https://conda.anaconda.org/conda-forge/linux-64/doit-0.33.1-py38h32f6830_1.tar.bz2#c3a34ba48a004ab17e926f72f13ca488
 https://conda.anaconda.org/conda-forge/noarch/importlib_metadata-3.4.0-hd8ed1ab_0.tar.bz2#6d962cade0658bb1040a3e994add14e0
-https://conda.anaconda.org/conda-forge/linux-64/jupyter_core-4.7.0-py38h578d9bd_0.tar.bz2#aa83f54189c3289055f7811fbabc2d12
+https://conda.anaconda.org/conda-forge/linux-64/jupyter_core-4.7.0-py38h578d9bd_1.tar.bz2#95f2db3ba89c5fe85d192dbb3aba3705
 https://conda.anaconda.org/conda-forge/linux-64/setuptools-49.6.0-py38h578d9bd_3.tar.bz2#59c561cd1be0db9cf1c83f7d7cc74f4d
 https://conda.anaconda.org/conda-forge/linux-64/terminado-0.9.2-py38h578d9bd_0.tar.bz2#b393b87288c795827bf962f9f4cb2a18
 https://conda.anaconda.org/conda-forge/noarch/backports.functools_lru_cache-1.6.1-py_0.tar.bz2#d36df15eaef96549ce6231e3088fba54
-https://conda.anaconda.org/conda-forge/noarch/bleach-3.2.1-pyh9f0ad1d_0.tar.bz2#d4506316b85679972c0b78d4d1c0b701
+https://conda.anaconda.org/conda-forge/noarch/bleach-3.2.2-pyh44b312d_0.tar.bz2#b904fbb564f8eaf064f909667d8a8c72
 https://conda.anaconda.org/conda-forge/noarch/jinja2-2.11.2-pyh9f0ad1d_0.tar.bz2#e8a5d614d1a27bdba00059ca062a0551
 https://conda.anaconda.org/conda-forge/noarch/jsonschema-3.2.0-py_2.tar.bz2#a17aa962de6145d08e1008cb37c20161
 https://conda.anaconda.org/conda-forge/noarch/jupyter_client-6.1.11-pyhd8ed1ab_1.tar.bz2#0fcd80df6d4e0558754c39453ffa3110
@@ -98,7 +99,7 @@ https://conda.anaconda.org/conda-forge/noarch/nbformat-5.1.2-pyhd8ed1ab_1.tar.bz
 https://conda.anaconda.org/conda-forge/noarch/urllib3-1.26.2-pyhd8ed1ab_0.tar.bz2#8bb930d172961c9ba9ffd6e10a64b844
 https://conda.anaconda.org/conda-forge/noarch/wcwidth-0.2.5-pyh9f0ad1d_2.tar.bz2#5266fcd697043c59621fda522b3d78ee
 https://conda.anaconda.org/conda-forge/noarch/nbclient-0.5.1-py_0.tar.bz2#4efba375c50e6668cb5778e36d1f3a7e
-https://conda.anaconda.org/conda-forge/noarch/prompt-toolkit-3.0.10-pyha770c72_0.tar.bz2#8f2f65a9eedc7b3a9c5ea6374c541453
+https://conda.anaconda.org/conda-forge/noarch/prompt-toolkit-3.0.11-pyha770c72_0.tar.bz2#05bd266666534f7e639e9d36d093eb70
 https://conda.anaconda.org/conda-forge/noarch/requests-2.25.1-pyhd3deb0d_0.tar.bz2#ae687aba31a1c400192a86a2e993ffdc
 https://conda.anaconda.org/conda-forge/linux-64/selenium-3.141.0-py38h497a2fe_1002.tar.bz2#5f732f64b2873cfc34a825c38faaeca0
 https://conda.anaconda.org/conda-forge/linux-64/ipython-7.18.1-py38h1cdfbd6_1.tar.bz2#13360063217908a5ee2274563d943b30
@@ -108,7 +109,9 @@ https://conda.anaconda.org/conda-forge/linux-64/ipykernel-5.4.2-py38h81c977d_0.t
 https://conda.anaconda.org/conda-forge/linux-64/jupyter_server-1.2.2-py38h578d9bd_1.tar.bz2#5dd02140aa2e05c584e457951235ff67
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab_server-2.1.2-pyhd8ed1ab_0.tar.bz2#78085479d089821058c00bf6fcfeda9f
 https://conda.anaconda.org/conda-forge/linux-64/notebook-6.2.0-py38h578d9bd_0.tar.bz2#d1cf2e59ef416d9073051a4b4565159a
+https://conda.anaconda.org/conda-forge/noarch/voila-0.2.6-pyhd8ed1ab_0.tar.bz2#c643959a3db7b6aa71d3865cff8b49d7
 https://conda.anaconda.org/conda-forge/noarch/nbclassic-0.2.6-pyhd8ed1ab_0.tar.bz2#49be35e31b49012ea91fcd667ebdf4ad
 https://conda.anaconda.org/conda-forge/linux-64/widgetsnbextension-3.5.1-py38h578d9bd_4.tar.bz2#beb8a105545382ba138c81c926289b5b
 https://conda.anaconda.org/conda-forge/noarch/ipywidgets-7.6.3-pyhd3deb0d_0.tar.bz2#536a9ed6d9e740f2b83d1a3c388e4388
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab-3.0.5-pyhd8ed1ab_0.tar.bz2#4824b73d683d4efb2f3dfb352b24544a
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab-classic-0.1.3-pyhd8ed1ab_0.tar.bz2#013aacb9a2d9b39bdd3c88331747a7dd
diff --git a/.github/locks/test/linux-64/py3.9/lab3/conda.lock b/.github/locks/test/linux-64/py3.9/lab3/conda.lock
index f7b53526..2391c949 100644
--- a/.github/locks/test/linux-64/py3.9/lab3/conda.lock
+++ b/.github/locks/test/linux-64/py3.9/lab3/conda.lock
@@ -1,5 +1,5 @@
 # platform: linux-64
-# env_hash: f4905630cacdb7f2ff4494758dfb0d573c8281382bbf857faa8e066213cdfa4d
+# env_hash: e6495a70cf300f6d11873255e95eb465782672a0f60f67cd8ae82000679207be
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
 https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
@@ -38,6 +38,7 @@ https://conda.anaconda.org/conda-forge/noarch/entrypoints-0.3-pyhd8ed1ab_1003.ta
 https://conda.anaconda.org/conda-forge/noarch/idna-2.10-pyh9f0ad1d_0.tar.bz2#f95a12b4f435aae6680fe55ae2eb1b06
 https://conda.anaconda.org/conda-forge/noarch/ipython_genutils-0.2.0-py_1.tar.bz2#5071c982548b3a20caf70462f04f5287
 https://conda.anaconda.org/conda-forge/noarch/json5-0.9.5-pyh9f0ad1d_0.tar.bz2#10759827a94e6b14996e81fb002c0bda
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab_robotmode-0.2.0-pyhd8ed1ab_0.tar.bz2#d47faff8538311d7e67e8ab89d8a7c4e
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab_widgets-1.0.0-pyhd8ed1ab_1.tar.bz2#f8da92114c8fbe1d951b0efaf54dd14b
 https://conda.anaconda.org/conda-forge/noarch/nest-asyncio-1.4.3-pyhd8ed1ab_0.tar.bz2#a1f2fda4d88c624810bf2029aa4c0827
 https://conda.anaconda.org/conda-forge/noarch/pandocfilters-1.4.2-py_1.tar.bz2#ba6f4a308f1ea22abe1d72e72544af76
@@ -70,7 +71,7 @@ https://conda.anaconda.org/conda-forge/linux-64/pyinotify-0.9.6-py39hf3d152e_100
 https://conda.anaconda.org/conda-forge/linux-64/pyrsistent-0.17.3-py39h3811e60_2.tar.bz2#4ec88cc4b941bc447fd97cadd76e32de
 https://conda.anaconda.org/conda-forge/linux-64/pysocks-1.7.1-py39hf3d152e_3.tar.bz2#f7e7fdc66f2362bebc407f1ab7d10f63
 https://conda.anaconda.org/conda-forge/noarch/python-dateutil-2.8.1-py_0.tar.bz2#0d0150ed9c2d25817f5324108d3f7571
-https://conda.anaconda.org/conda-forge/linux-64/pyyaml-5.3.1-py39h3811e60_2.tar.bz2#fac50e6fc08410c096133eabc58ba213
+https://conda.anaconda.org/conda-forge/linux-64/pyyaml-5.4.1-py39h3811e60_0.tar.bz2#6451ed66b3b438134626894c821dc5fa
 https://conda.anaconda.org/conda-forge/linux-64/pyzmq-21.0.1-py39hea8fd45_0.tar.bz2#a3ecacd4fe9f07c24dc67b354a0c8d43
 https://conda.anaconda.org/conda-forge/noarch/robotframework-pabot-1.10.1-pyhd8ed1ab_0.tar.bz2#ae21522f8d111b5568b30d5e264e6093
 https://conda.anaconda.org/conda-forge/noarch/robotframework-pythonlibcore-2.2.0-pyhd8ed1ab_0.tar.bz2#29a329f0b817038d27d7bdfb2ca04b5a
@@ -83,11 +84,11 @@ https://conda.anaconda.org/conda-forge/linux-64/brotlipy-0.7.0-py39h3811e60_1001
 https://conda.anaconda.org/conda-forge/linux-64/cryptography-3.3.1-py39h3da14fd_1.tar.bz2#c5e8ab024cb05cb6eea368c23bfecfbe
 https://conda.anaconda.org/conda-forge/linux-64/doit-0.33.1-py39hde42818_1.tar.bz2#b90af2ca73f3686e5171798ca539ea85
 https://conda.anaconda.org/conda-forge/noarch/importlib_metadata-3.4.0-hd8ed1ab_0.tar.bz2#6d962cade0658bb1040a3e994add14e0
-https://conda.anaconda.org/conda-forge/linux-64/jupyter_core-4.7.0-py39hf3d152e_0.tar.bz2#8735747a563952d4bae6f8a8f5b71d94
+https://conda.anaconda.org/conda-forge/linux-64/jupyter_core-4.7.0-py39hf3d152e_1.tar.bz2#8fc7283fc737009f2aad8698ac3f17d7
 https://conda.anaconda.org/conda-forge/linux-64/setuptools-49.6.0-py39hf3d152e_3.tar.bz2#4397280abb201d7adff59099e12e7ddd
 https://conda.anaconda.org/conda-forge/linux-64/terminado-0.9.2-py39hf3d152e_0.tar.bz2#be4a43825c2a6ca3638cbdcceeb7977d
 https://conda.anaconda.org/conda-forge/noarch/backports.functools_lru_cache-1.6.1-py_0.tar.bz2#d36df15eaef96549ce6231e3088fba54
-https://conda.anaconda.org/conda-forge/noarch/bleach-3.2.1-pyh9f0ad1d_0.tar.bz2#d4506316b85679972c0b78d4d1c0b701
+https://conda.anaconda.org/conda-forge/noarch/bleach-3.2.2-pyh44b312d_0.tar.bz2#b904fbb564f8eaf064f909667d8a8c72
 https://conda.anaconda.org/conda-forge/noarch/jinja2-2.11.2-pyh9f0ad1d_0.tar.bz2#e8a5d614d1a27bdba00059ca062a0551
 https://conda.anaconda.org/conda-forge/noarch/jsonschema-3.2.0-py_2.tar.bz2#a17aa962de6145d08e1008cb37c20161
 https://conda.anaconda.org/conda-forge/noarch/jupyter_client-6.1.11-pyhd8ed1ab_1.tar.bz2#0fcd80df6d4e0558754c39453ffa3110
@@ -99,7 +100,7 @@ https://conda.anaconda.org/conda-forge/noarch/nbformat-5.1.2-pyhd8ed1ab_1.tar.bz
 https://conda.anaconda.org/conda-forge/noarch/urllib3-1.26.2-pyhd8ed1ab_0.tar.bz2#8bb930d172961c9ba9ffd6e10a64b844
 https://conda.anaconda.org/conda-forge/noarch/wcwidth-0.2.5-pyh9f0ad1d_2.tar.bz2#5266fcd697043c59621fda522b3d78ee
 https://conda.anaconda.org/conda-forge/noarch/nbclient-0.5.1-py_0.tar.bz2#4efba375c50e6668cb5778e36d1f3a7e
-https://conda.anaconda.org/conda-forge/noarch/prompt-toolkit-3.0.10-pyha770c72_0.tar.bz2#8f2f65a9eedc7b3a9c5ea6374c541453
+https://conda.anaconda.org/conda-forge/noarch/prompt-toolkit-3.0.11-pyha770c72_0.tar.bz2#05bd266666534f7e639e9d36d093eb70
 https://conda.anaconda.org/conda-forge/noarch/requests-2.25.1-pyhd3deb0d_0.tar.bz2#ae687aba31a1c400192a86a2e993ffdc
 https://conda.anaconda.org/conda-forge/linux-64/selenium-3.141.0-py39h3811e60_1002.tar.bz2#7940c80bbcaba73aa4913dabb5f6d22e
 https://conda.anaconda.org/conda-forge/linux-64/ipython-7.18.1-py39h9cd51e4_1.tar.bz2#55ac9afa08569da94a45015aa9ad2ef6
@@ -109,7 +110,9 @@ https://conda.anaconda.org/conda-forge/linux-64/ipykernel-5.4.2-py39hef51801_0.t
 https://conda.anaconda.org/conda-forge/linux-64/jupyter_server-1.2.2-py39hf3d152e_1.tar.bz2#1488f875f849e607ec599228491050b1
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab_server-2.1.2-pyhd8ed1ab_0.tar.bz2#78085479d089821058c00bf6fcfeda9f
 https://conda.anaconda.org/conda-forge/linux-64/notebook-6.2.0-py39hf3d152e_0.tar.bz2#b41aa687fbe881f4941707dc8646bdfc
+https://conda.anaconda.org/conda-forge/noarch/voila-0.2.6-pyhd8ed1ab_0.tar.bz2#c643959a3db7b6aa71d3865cff8b49d7
 https://conda.anaconda.org/conda-forge/noarch/nbclassic-0.2.6-pyhd8ed1ab_0.tar.bz2#49be35e31b49012ea91fcd667ebdf4ad
 https://conda.anaconda.org/conda-forge/linux-64/widgetsnbextension-3.5.1-py39hf3d152e_4.tar.bz2#ae54c7d751b678c0021929892d598ecd
 https://conda.anaconda.org/conda-forge/noarch/ipywidgets-7.6.3-pyhd3deb0d_0.tar.bz2#536a9ed6d9e740f2b83d1a3c388e4388
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab-3.0.5-pyhd8ed1ab_0.tar.bz2#4824b73d683d4efb2f3dfb352b24544a
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab-classic-0.1.3-pyhd8ed1ab_0.tar.bz2#013aacb9a2d9b39bdd3c88331747a7dd
diff --git a/.github/locks/test/osx-64/py3.8/lab3/conda.lock b/.github/locks/test/osx-64/py3.8/lab3/conda.lock
index ded52cb3..b9102e9c 100644
--- a/.github/locks/test/osx-64/py3.8/lab3/conda.lock
+++ b/.github/locks/test/osx-64/py3.8/lab3/conda.lock
@@ -1,8 +1,8 @@
 # platform: osx-64
-# env_hash: 1e76205fd654504b7e701cc907fc22e74813e17d50ef95873ec9b610f82ce3ec
+# env_hash: e2f894abb86ce5f3d169a7ab95f2d0302df5ac1b4ebd2141c4236e5a354624bd
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/osx-64/ca-certificates-2020.12.5-h033912b_0.tar.bz2#4483d8ea13bd57b52e3539e741501a7d
-https://conda.anaconda.org/conda-forge/osx-64/libcxx-11.0.0-h4c3b8ed_1.tar.bz2#6a22f1c899bcf110c39cd6d959a8555e
+https://conda.anaconda.org/conda-forge/osx-64/libcxx-11.0.1-habf9029_0.tar.bz2#51c221f12b7975d60dae27cd8280efac
 https://conda.anaconda.org/conda-forge/osx-64/libsodium-1.0.18-hbcb3906_1.tar.bz2#24632c09ed931af617fe6d5292919cab
 https://conda.anaconda.org/conda-forge/osx-64/libuv-1.40.0-h35c211d_0.tar.bz2#4e1f53e460522ec90606a608c0cf498e
 https://conda.anaconda.org/conda-forge/osx-64/ncurses-6.2-h2e338ed_4.tar.bz2#9cef1910395d1543527583e73dba30f1
@@ -32,6 +32,7 @@ https://conda.anaconda.org/conda-forge/noarch/entrypoints-0.3-pyhd8ed1ab_1003.ta
 https://conda.anaconda.org/conda-forge/noarch/idna-2.10-pyh9f0ad1d_0.tar.bz2#f95a12b4f435aae6680fe55ae2eb1b06
 https://conda.anaconda.org/conda-forge/noarch/ipython_genutils-0.2.0-py_1.tar.bz2#5071c982548b3a20caf70462f04f5287
 https://conda.anaconda.org/conda-forge/noarch/json5-0.9.5-pyh9f0ad1d_0.tar.bz2#10759827a94e6b14996e81fb002c0bda
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab_robotmode-0.2.0-pyhd8ed1ab_0.tar.bz2#d47faff8538311d7e67e8ab89d8a7c4e
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab_widgets-1.0.0-pyhd8ed1ab_1.tar.bz2#f8da92114c8fbe1d951b0efaf54dd14b
 https://conda.anaconda.org/conda-forge/noarch/nest-asyncio-1.4.3-pyhd8ed1ab_0.tar.bz2#a1f2fda4d88c624810bf2029aa4c0827
 https://conda.anaconda.org/conda-forge/noarch/pandocfilters-1.4.2-py_1.tar.bz2#ba6f4a308f1ea22abe1d72e72544af76
@@ -65,7 +66,7 @@ https://conda.anaconda.org/conda-forge/noarch/pexpect-4.8.0-pyh9f0ad1d_2.tar.bz2
 https://conda.anaconda.org/conda-forge/osx-64/pyrsistent-0.17.3-py38h5406a74_2.tar.bz2#50060fafbdcf7202bf3aec945555b911
 https://conda.anaconda.org/conda-forge/osx-64/pysocks-1.7.1-py38h50d1736_3.tar.bz2#cbf7ab149d29e578a094bcf99d2dbf09
 https://conda.anaconda.org/conda-forge/noarch/python-dateutil-2.8.1-py_0.tar.bz2#0d0150ed9c2d25817f5324108d3f7571
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+https://conda.anaconda.org/conda-forge/osx-64/pyyaml-5.4.1-py38h5406a74_0.tar.bz2#bf86e551c8730e6f6fd8b01b082929c3
 https://conda.anaconda.org/conda-forge/osx-64/pyzmq-21.0.1-py38h1cb0b96_0.tar.bz2#e70ef3576281b6220f19e76ef4a0fe51
 https://conda.anaconda.org/conda-forge/noarch/robotframework-pabot-1.10.1-pyhd8ed1ab_0.tar.bz2#ae21522f8d111b5568b30d5e264e6093
 https://conda.anaconda.org/conda-forge/noarch/robotframework-pythonlibcore-2.2.0-pyhd8ed1ab_0.tar.bz2#29a329f0b817038d27d7bdfb2ca04b5a
@@ -78,11 +79,11 @@ https://conda.anaconda.org/conda-forge/osx-64/brotlipy-0.7.0-py38h5406a74_1001.t
 https://conda.anaconda.org/conda-forge/osx-64/cryptography-3.3.1-py38h6b4ec92_1.tar.bz2#6abac77df622b0872db88b8c87da3300
 https://conda.anaconda.org/conda-forge/osx-64/doit-0.33.1-py38h32f6830_1.tar.bz2#15dba72dfa4453ebafe25a9fd526811a
 https://conda.anaconda.org/conda-forge/noarch/importlib_metadata-3.4.0-hd8ed1ab_0.tar.bz2#6d962cade0658bb1040a3e994add14e0
-https://conda.anaconda.org/conda-forge/osx-64/jupyter_core-4.7.0-py38h50d1736_0.tar.bz2#3b207eb36704052c8b3263679f63b5af
+https://conda.anaconda.org/conda-forge/osx-64/jupyter_core-4.7.0-py38h50d1736_1.tar.bz2#cae9c53d27f89e9b90a6414a53104290
 https://conda.anaconda.org/conda-forge/osx-64/setuptools-49.6.0-py38h50d1736_3.tar.bz2#af8a81ee7c2c09fc2884c800a044b616
 https://conda.anaconda.org/conda-forge/osx-64/terminado-0.9.2-py38h50d1736_0.tar.bz2#88a2f516f01292e5868e21097078d3ff
 https://conda.anaconda.org/conda-forge/noarch/backports.functools_lru_cache-1.6.1-py_0.tar.bz2#d36df15eaef96549ce6231e3088fba54
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+https://conda.anaconda.org/conda-forge/noarch/bleach-3.2.2-pyh44b312d_0.tar.bz2#b904fbb564f8eaf064f909667d8a8c72
 https://conda.anaconda.org/conda-forge/noarch/jinja2-2.11.2-pyh9f0ad1d_0.tar.bz2#e8a5d614d1a27bdba00059ca062a0551
 https://conda.anaconda.org/conda-forge/noarch/jsonschema-3.2.0-py_2.tar.bz2#a17aa962de6145d08e1008cb37c20161
 https://conda.anaconda.org/conda-forge/noarch/jupyter_client-6.1.11-pyhd8ed1ab_1.tar.bz2#0fcd80df6d4e0558754c39453ffa3110
@@ -94,7 +95,7 @@ https://conda.anaconda.org/conda-forge/noarch/nbformat-5.1.2-pyhd8ed1ab_1.tar.bz
 https://conda.anaconda.org/conda-forge/noarch/urllib3-1.26.2-pyhd8ed1ab_0.tar.bz2#8bb930d172961c9ba9ffd6e10a64b844
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+https://conda.anaconda.org/conda-forge/noarch/prompt-toolkit-3.0.11-pyha770c72_0.tar.bz2#05bd266666534f7e639e9d36d093eb70
 https://conda.anaconda.org/conda-forge/noarch/requests-2.25.1-pyhd3deb0d_0.tar.bz2#ae687aba31a1c400192a86a2e993ffdc
 https://conda.anaconda.org/conda-forge/osx-64/selenium-3.141.0-py38h5406a74_1002.tar.bz2#4da1bd4d90f6474760e3c99660dfd38c
 https://conda.anaconda.org/conda-forge/osx-64/ipython-7.18.1-py38h1cdfbd6_1.tar.bz2#db4cdc5271bf9b9b7115a7e54c4dbd5a
@@ -104,7 +105,9 @@ https://conda.anaconda.org/conda-forge/osx-64/ipykernel-5.4.2-py38h9bb44b7_0.tar
 https://conda.anaconda.org/conda-forge/osx-64/jupyter_server-1.2.2-py38h50d1736_1.tar.bz2#2564a8dab5b4c80eaa9429addb2e8079
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab_server-2.1.2-pyhd8ed1ab_0.tar.bz2#78085479d089821058c00bf6fcfeda9f
 https://conda.anaconda.org/conda-forge/osx-64/notebook-6.2.0-py38h50d1736_0.tar.bz2#22c481b3ed65c1f6d87db00431abbb30
+https://conda.anaconda.org/conda-forge/noarch/voila-0.2.6-pyhd8ed1ab_0.tar.bz2#c643959a3db7b6aa71d3865cff8b49d7
 https://conda.anaconda.org/conda-forge/noarch/nbclassic-0.2.6-pyhd8ed1ab_0.tar.bz2#49be35e31b49012ea91fcd667ebdf4ad
 https://conda.anaconda.org/conda-forge/osx-64/widgetsnbextension-3.5.1-py38h50d1736_4.tar.bz2#7d69dd67c8a01d72b41e73102141afb8
 https://conda.anaconda.org/conda-forge/noarch/ipywidgets-7.6.3-pyhd3deb0d_0.tar.bz2#536a9ed6d9e740f2b83d1a3c388e4388
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab-3.0.5-pyhd8ed1ab_0.tar.bz2#4824b73d683d4efb2f3dfb352b24544a
+https://conda.anaconda.org/conda-forge/noarch/jupyterlab-classic-0.1.3-pyhd8ed1ab_0.tar.bz2#013aacb9a2d9b39bdd3c88331747a7dd
diff --git a/.github/locks/test/osx-64/py3.9/lab3/conda.lock b/.github/locks/test/osx-64/py3.9/lab3/conda.lock
index 7b74469b..3e5843c1 100644
--- a/.github/locks/test/osx-64/py3.9/lab3/conda.lock
+++ b/.github/locks/test/osx-64/py3.9/lab3/conda.lock
@@ -1,8 +1,8 @@
 # platform: osx-64
-# env_hash: c1b75d230b455e4cbf1e84762b5919790ad22943807e224a392a1ea30bbf7c35
+# env_hash: 373c763f99617d8f64da7e097f41d10e1bfaa6119df3d848dfce4bea59e6cc50
 @EXPLICIT
 https://conda.anaconda.org/conda-forge/osx-64/ca-certificates-2020.12.5-h033912b_0.tar.bz2#4483d8ea13bd57b52e3539e741501a7d
-https://conda.anaconda.org/conda-forge/osx-64/libcxx-11.0.0-h4c3b8ed_1.tar.bz2#6a22f1c899bcf110c39cd6d959a8555e
+https://conda.anaconda.org/conda-forge/osx-64/libcxx-11.0.1-habf9029_0.tar.bz2#51c221f12b7975d60dae27cd8280efac
 https://conda.anaconda.org/conda-forge/osx-64/libsodium-1.0.18-hbcb3906_1.tar.bz2#24632c09ed931af617fe6d5292919cab
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@@ -33,6 +33,7 @@ https://conda.anaconda.org/conda-forge/noarch/entrypoints-0.3-pyhd8ed1ab_1003.ta
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+https://conda.anaconda.org/conda-forge/noarch/jupyterlab_robotmode-0.2.0-pyhd8ed1ab_0.tar.bz2#d47faff8538311d7e67e8ab89d8a7c4e
 https://conda.anaconda.org/conda-forge/noarch/jupyterlab_widgets-1.0.0-pyhd8ed1ab_1.tar.bz2#f8da92114c8fbe1d951b0efaf54dd14b
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@@ -66,7 +67,7 @@ https://conda.anaconda.org/conda-forge/noarch/pexpect-4.8.0-pyh9f0ad1d_2.tar.bz2
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 https://conda.anaconda.org/conda-forge/noarch/python-dateutil-2.8.1-py_0.tar.bz2#0d0150ed9c2d25817f5324108d3f7571
-https://conda.anaconda.org/conda-forge/osx-64/pyyaml-5.3.1-py39hcbf5805_2.tar.bz2#829a94c4aec222dc9d5851ed28c67f84
+https://conda.anaconda.org/conda-forge/osx-64/pyyaml-5.4.1-py39hcbf5805_0.tar.bz2#16125bf06cd4bb0749f109f1451d7ed4
 https://conda.anaconda.org/conda-forge/osx-64/pyzmq-21.0.1-py39hd6373f1_0.tar.bz2#0567276156ec1f689bcf7157c6afe947
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@@ -79,11 +80,11 @@ https://conda.anaconda.org/conda-forge/osx-64/brotlipy-0.7.0-py39hcbf5805_1001.t
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 https://conda.anaconda.org/conda-forge/noarch/importlib_metadata-3.4.0-hd8ed1ab_0.tar.bz2#6d962cade0658bb1040a3e994add14e0
-https://conda.anaconda.org/conda-forge/osx-64/jupyter_core-4.7.0-py39h6e9494a_0.tar.bz2#f6c704f44ba49a5e38bae0b8ec4683d4
+https://conda.anaconda.org/conda-forge/osx-64/jupyter_core-4.7.0-py39h6e9494a_1.tar.bz2#c39012eff135900c7b7f37be465a3793
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diff --git a/.github/locks/test/win-64/py3.8/lab3/conda.lock b/.github/locks/test/win-64/py3.8/lab3/conda.lock
new file mode 100644
index 00000000..00fb6910
--- /dev/null
+++ b/.github/locks/test/win-64/py3.8/lab3/conda.lock
@@ -0,0 +1,114 @@
+# platform: win-64
+# env_hash: 4b3de14a5541cd549bc8e73683f44dfa50a5aa836e5f74e6e99dc1115cff3dec
+@EXPLICIT
+https://conda.anaconda.org/conda-forge/win-64/ca-certificates-2020.12.5-h5b45459_0.tar.bz2#f36a2988a9f57cffdc43929ba67a3a2a
+https://conda.anaconda.org/conda-forge/win-64/msys2-conda-epoch-20160418-1.tar.bz2#b0309b72560df66f71a9d5e34a5efdfa
+https://conda.anaconda.org/conda-forge/win-64/pandoc-2.11.3.2-h8ffe710_0.tar.bz2#f2897932fdaa21ffc32304195125d96e
+https://conda.anaconda.org/conda-forge/win-64/vs2015_runtime-14.28.29325-h5e1d092_0.tar.bz2#4e4fc486090f90e00edfa9c7730e2771
+https://conda.anaconda.org/conda-forge/win-64/winpty-0.4.3-4.tar.bz2#1cee351bf20b830d991dbe0bc8cd7dfe
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+https://conda.anaconda.org/conda-forge/win-64/m2w64-libwinpthread-git-5.0.0.4634.697f757-2.tar.bz2#774130a326dee16f1ceb05cc687ee4f0
+https://conda.anaconda.org/conda-forge/win-64/nodejs-14.15.1-h57928b3_0.tar.bz2#d864e5c8a3de3ccf10a5cfc841084c39
+https://conda.anaconda.org/conda-forge/win-64/vc-14.2-hb210afc_2.tar.bz2#6852e7ea3601522ab1d4fa60fec8c4fe
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index 00000000..4d3597a6
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diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a57683c3..b0f9e682 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -161,8 +161,6 @@ jobs:
         exclude:
           - python-version: py3.6
             lab-version: lab3
-          - conda-subdir: win-64
-            lab-version: lab3
 
     steps:
       - name: configure git
diff --git a/docs/rtd.yml b/docs/rtd.yml
index a62a92e2..30531d05 100644
--- a/docs/rtd.yml
+++ b/docs/rtd.yml
@@ -6,56 +6,56 @@
 #
 # platform: linux-64
 # env_hash: baf0cc369f22fad2db7764b3b3e0385b5cf603babfb56b20aa5e9b34a4ea7944
-
 channels:
   - conda-forge
   - nodefaults
 dependencies:
   - https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2#d7c89558ba9fa0495403155b64376d81
-  - https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.11.8-ha878542_0.tar.bz2#f9cdccd43ac20a0d1637d84d58c6ff5c
-  - https://conda.anaconda.org/conda-forge/linux-64/ld_impl_linux-64-2.35.1-hed1e6ac_0.tar.bz2#d0cf77c331382475133dc6c34e7461d7
-  - https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-9.3.0-h2ae2ef3_17.tar.bz2#342f3c931d0a3a209ab09a522469d20c
-  - https://conda.anaconda.org/conda-forge/linux-64/pandoc-2.11.2-h36c2ea0_0.tar.bz2#a0f3b9a8abf73111682fb0c3124c25ec
-  - https://conda.anaconda.org/conda-forge/linux-64/libgomp-9.3.0-h5dbcf3e_17.tar.bz2#8fd587013b9da8b52050268d50c12305
+  - https://conda.anaconda.org/conda-forge/linux-64/ca-certificates-2020.12.5-ha878542_0.tar.bz2#7eb5d4ffeee663caa1635cd67071bc1b
+  - https://conda.anaconda.org/conda-forge/linux-64/ld_impl_linux-64-2.35.1-hea4e1c9_1.tar.bz2#cdabe198d509eeae33a9fc8741d7841d
+  - https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-9.3.0-h6de172a_18.tar.bz2#2f03cd1e5c966d4af5822c7ae089ab03
+  - https://conda.anaconda.org/conda-forge/linux-64/pandoc-2.11.3.2-h7f98852_0.tar.bz2#246cf35a350cc2559bc21408ca206bcf
+  - https://conda.anaconda.org/conda-forge/linux-64/libgomp-9.3.0-h2828fa1_18.tar.bz2#fc7a2a7e6a741c8afdd764715ac7039d
   - https://conda.anaconda.org/conda-forge/linux-64/_openmp_mutex-4.5-1_gnu.tar.bz2#561e277319a41d4f24f5c05a9ef63c04
-  - https://conda.anaconda.org/conda-forge/linux-64/libgcc-ng-9.3.0-h5dbcf3e_17.tar.bz2#fc9f5adabc4d55cd4b491332adc413e0
+  - https://conda.anaconda.org/conda-forge/linux-64/libgcc-ng-9.3.0-h2828fa1_18.tar.bz2#5a9490c49a3505a6d19bda012cde6ad3
   - https://conda.anaconda.org/conda-forge/linux-64/icu-68.1-h58526e2_0.tar.bz2#fc7a4271dc2a7f4fd78cd63695baf7c3
-  - https://conda.anaconda.org/conda-forge/linux-64/libffi-3.3-h58526e2_1.tar.bz2#8e42ee98679696e0ddfde5521c98da60
-  - https://conda.anaconda.org/conda-forge/linux-64/libsodium-1.0.18-h516909a_1.tar.bz2#e1ca1a4b82f7b51b29318f80cebae84a
-  - https://conda.anaconda.org/conda-forge/linux-64/libuv-1.40.0-hd18ef5c_0.tar.bz2#1b13a5d453ff9c552252af8fae5e15ff
+  - https://conda.anaconda.org/conda-forge/linux-64/libffi-3.3-h58526e2_2.tar.bz2#665369991d8dd290ac5ee92fce3e6bf5
+  - https://conda.anaconda.org/conda-forge/linux-64/libsodium-1.0.18-h36c2ea0_1.tar.bz2#c3788462a6fbddafdb413a9f9053e58d
+  - https://conda.anaconda.org/conda-forge/linux-64/libuv-1.40.0-h7f98852_0.tar.bz2#b28922850963c5ce6ea2bd6d239a335e
   - https://conda.anaconda.org/conda-forge/linux-64/ncurses-6.2-h58526e2_4.tar.bz2#509f2a21c4a09214cd737a480dfd80c9
-  - https://conda.anaconda.org/conda-forge/linux-64/openssl-1.1.1h-h516909a_0.tar.bz2#3a99e0cb8f325dbf8f616da2d2fb6d4f
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