Document version key format
@@ -296,7 +296,8 @@ class AppDashboardData():
version, storing it in the Datastore for later viewing.
Args:
- version_key: A string specifying the version key.
+ version_key: A string specifying the version key in the form
+ project-id_service-id_version-id.
"""
app_id = version_key.split('_')[0]
try:
