How to get PSI element for module item in 'packages' tree

I called action on module in 'Packages' scope view (it is root tree item when enabled option 'Show modules'). 
Action event handled in method. 
Call 
actionEvent.getData(LangDataKeys.PSI_ELEMENT_ARRAY)

returns null.

But if I clicked on package, folder, or class then it will not be null.
 
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