#NEWLINE# def __init__( self , start , stop , step , source_ref ) : #NEWLINE# #INDENT# NodeBase . __init__ ( self , source_ref = source_ref ) #NEWLINE# if ( start is None ) : #NEWLINE# #INDENT# start = ExpressionConstantRef ( constant = None , source_ref = source_ref ) #NEWLINE# #UNINDENT# if ( stop is None ) : #NEWLINE# #INDENT# stop = ExpressionConstantRef ( constant = None , source_ref = source_ref ) #NEWLINE# #UNINDENT# if ( step is None ) : #NEWLINE# #INDENT# step = ExpressionConstantRef ( constant = None , source_ref = source_ref ) #NEWLINE# #UNINDENT# ChildrenHavingMixin . __init__ ( self , values = { #NEWLINE# #INDENT# 'start' : start , #NEWLINE# 'stop' : stop , #NEWLINE# 'step' : step , #NEWLINE# #UNINDENT# } )