#NEWLINE# def add_state( self , window , tag , value ) : #NEWLINE# #INDENT# if isinstance ( tag , ValueStateTag ) : #NEWLINE# #INDENT# raise ValueError ( ( 'Merging requested for non-mergeable state tag: %r.' % tag ) ) #NEWLINE# #UNINDENT# self . raw_state . add_state ( self . _get_id ( window ) , value , value )