field `__real__` of struct `X` is private + field `__prototype__` of struct `X` is private

[xwitch1707]

when i split my "classes" into separated files, i cannot "extend" the class in other file.
below is the happened error:

Could you help me to fix this, or if something's wrong in the code, can you fix it then republish new code to crates.io for me?

thank you so much.