def _get_custom_field_names(self, project_ids):
        project_name_key = self._import_config.get_key_for_field_name(self._import_config.get_project_name_key())
        project_id_key = self._import_config.get_key_for_field_name(self._import_config.get_project_id_key())
        return [key for key in self._source.get_header() if (key not in [project_name_key, project_id_key])]
dataset/ETHPy150Open JetBrains/youtrack-rest-python-library/python/csv2youtrack.py/CsvYouTrackImporter._get_custom_field_names/original