'Upload all of the file splits (and optionally the schema .json file) to
Google cloud storage.'

def _upload_to_gcs(self, files_to_upload):

    hook = GoogleCloudStorageHook(google_cloud_storage_conn_id=self.google_cloud_storage_conn_id, delegate_to=self.delegate_to)
    for (object, tmp_file_handle) in files_to_upload.items():
        hook.upload(self.bucket, object, tmp_file_handle.name, 'application/json')
