':param mutant: The mutant to verify
:return: True if the mutant is already tagged as a potential vuln'

def _has_potential_vuln(self, mutant):

    for (url, token_name, stored_mutant, id_list) in self._potential_vulns:
        if (mutant.get_url() != url):
            continue
        if (mutant.get_token_name() != token_name):
            continue
        return True
    return False
