def METHOD_NAME(self):
    """Builds config required for A/B update."""
    with zipfile.ZipFile(self.package, 'r') as package_zip:
        config = {
            'property_files': self._get_property_files(package_zip),
            'verify_payload_metadata': self.ab_verify_payload_metadata,
            'force_switch_slot': self.ab_force_switch_slot,
        }
    return config