Add docstring.

tseaver · tseaver · commit 31026aa8faef · 2015-08-17T16:24:12.000-04:00
Addresses: https://github.com/GoogleCloudPlatform/gcloud-python/pull/1056/files#r37027413
diff --git a/gcloud/bigquery/job.py b/gcloud/bigquery/job.py
@@ -577,7 +577,7 @@ def _require_client(self, client):
         return client
 
     def _populate_config_resource(self, configuration):
-
+        """Helper for _build_resource: copy config properties to resource"""
         if self.allow_jagged_rows is not None:
             configuration['allowJaggedRows'] = self.allow_jagged_rows
         if self.allow_quoted_newlines is not None:
