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

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

    for saved_vuln in self.get(location_a, location_b):
        if (saved_vuln.get_url() == info_inst.get_url()):
            return False
    return True
