#NEWLINE# @ mapping . setter #NEWLINE# def mapping( self , val ) : #NEWLINE# #INDENT# if ( self . PropMap is None ) : #NEWLINE# #INDENT# val . _assertMatchesPair ( val . mapPair ) #NEWLINE# self . _mapping = val #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# self . _mapping = self . PropMap ( val )