def METHOD_NAME(self, instances_networks_data):
    """Find violations in the policies.
        Args:
            instances_networks_data (list): instance networks data
                to find violations in
        Returns:
            list: A list of violations
    """
    all_violations = []
    LOGGER.info('Finding blacklisted ip addresses...')
    for instance_network_interface in instances_networks_data:
        LOGGER.debug('%s', instance_network_interface)
        violations = self.rules_engine.find_violations(
            instance_network_interface)
        LOGGER.debug(violations)
        all_violations.extend(violations)
    return all_violations