#NEWLINE# def contribute_to_class( self , model , name ) : #NEWLINE# #INDENT# super ( TreeManager , self ) . contribute_to_class ( model , name ) #NEWLINE# if ( not self . _meta . abstract ) : #NEWLINE# #INDENT# self . tree_model = _get_tree_model ( model ) #NEWLINE# self . _base_manager = None #NEWLINE# if ( self . tree_model is not model ) : #NEWLINE# #INDENT# self . _base_manager = self . tree_model . _tree_manager