#NEWLINE# def instance_exists( self , instance ) : #NEWLINE# #INDENT# 'Checks existence of an instance on the host.\n\n        :param instance: The instance to lookup\n\n        Returns True if supplied instance exists on the host, False otherwise.\n\n        NOTE(belliott): This is an override of the base method for\n        efficiency.\n        ' #NEWLINE# return self . _vmops . instance_exists ( instance . name )