handle_events must return the sub-handler results #91
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Issue #, if available:
When implementing handle_transcript_event() method, one might need to return values from there, but the upper class method handle_events() doesn't return anything, which leads to the lost of the returned value in the implemented method. Thus any calls to handle_events() returns None.
Description of changes:
Added the return clause to the handle_transcript_event() call inside handle_events()
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