#NEWLINE# def get_child_tiers_for_tier( self , tier ) : #NEWLINE# #INDENT# if ( tier . name == 'utterance' ) : #NEWLINE# #INDENT# return [ poioapi . io . graf . Tier ( 'word' ) ] #NEWLINE# #UNINDENT# if ( self . name == 'word' ) : #NEWLINE# #INDENT# return [ poioapi . io . graf . Tier ( 'graid' ) , poioapi . io . graf . Tier ( 'wfw' ) ] #NEWLINE# #UNINDENT# return None