PyCharm doesn't see maya.cmds contents

I'm running PyCharm Community 2019.2, developing python for maya 2020.
I have this in my source file:
    import maya.cmds as cmds
    cmds.ls()

PyCharm highlights the command name "ls" and the message when I mouse over it is:
    Cannot find reference 'ls' in '__init__.py'

This has always worked before, but I'm at a new job with a new setup and a newer version of maya now.  What do I need to do for PyCharm to correctly find the contents of maya.cmds ?
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