  def __init__(self, project_id: Optional[str] = None) -> None:
    """Initialize the GoogleCloudStorageTransfer object.

    Args:
      project_id (str): Optional. Google Cloud project ID.
    """

    self.gcst_api_client = None
    self.project_id = project_id
Initialize the GoogleCloudStorageTransfer object.

Args:
project_id (str): Optional. Google Cloud project ID.
libcloudforensics/providers/gcp/internal/storagetransfer.py