def _get_gcd_project():
    return os.getenv(GCD_DATASET)
Callable provided to MCM to return a previously mapped field.
dataset/ETHPy150Open GoogleCloudPlatform/gcloud-python/gcloud/datastore/client.py/_get_gcd_project--crossover with--dataset/ETHPy150Open buildingenergy/buildingenergy-platform/seed/models.py/get_column_mapping