Source button not showing in Admin

[amityweb]

Uploaded to third_party, enabled extension fine. Cleared all cache, reloaded, but Source button is not appearing.

Anything else we need to do?

EE version 2.7.3 and Wigwam version 3.2.2.

I assume your extension needs updating for newer version.

No console errors.

[amityweb]

Seems the following line is incorrect:
array_unshift($config['toolbar'], array(array('Source')));

It should be:
array_unshift($config['toolbar'], array('Source'));

I also decided to use array_push to have it on the right.