#NEWLINE# def __call__( self , decision , history , tracer ) : #NEWLINE# #INDENT# th = TaskHistory ( history , self . identity ) #NEWLINE# wd = WorkflowDecision ( decision , self . identity , history . f ) #NEWLINE# if ( tracer is None ) : #NEWLINE# #INDENT# return Proxy ( th , wd ) #NEWLINE# #UNINDENT# return TracingProxy ( tracer , self . identity , th , wd )