#NEWLINE# @ classmethod #NEWLINE# def is_reference( cls , ref ) : #NEWLINE# #INDENT# '\n        This method uses a very naive approach to determine if the provided\n        string is a reference - it only checks if this string contains\n        a separator.\n\n        :rtype ref: ``str``\n        ' #NEWLINE# return ( ref and ( cls . separator in ref ) and ( ref . index ( cls . separator ) > 0 ) )