def _get_field_name(self, field_name, project_id):
        field_name = self._import_config.get_field_name(field_name)
        if youtrack.EXISTING_FIELDS in field_name:
            return field_name
        try:
            self._target.getProjectCustomField(project_id, field_name)
            return field_name
        except YouTrackException:
            return None
dataset/ETHPy150Open JetBrains/youtrack-rest-python-library/python/youtrackImporter.py/YouTrackImporter._get_field_name/swapped operands of `in`