add instance aggregation
add instance aggregation


Former-commit-id: 018ea8cd19a9849d5f378513e6221df7ac45435a
Former-commit-id: 13a221397c01f0724b5cb1aae5e143396608b278
Former-commit-id: c4169d4b447a5eedf498b13b66b358da810ce184
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy