':return: True if there is no other info in (location_a, location_b)
with the same URL,Variable,DataContainer.keys() as the
info_inst.'

def filter_var(self, location_a, location_b, info_inst):

    for saved_vuln in self.get(location_a, location_b):
        if ((saved_vuln.get_token_name() == info_inst.get_token_name()) and (saved_vuln.get_url() == info_inst.get_url())):
            if ((saved_vuln.get_dc() is None) and (info_inst.get_dc() is None)):
                return False
            if ((saved_vuln.get_dc() is not None) and (info_inst.get_dc() is not None)):
                if (saved_vuln.get_dc().keys() == info_inst.get_dc().keys()):
                    return False
    return True
