add instance aggregation
add instance aggregation


Former-commit-id: 1a2471b865bb61cf1c57323700ad3963e21e67ed [formerly dd8c691bfc004851e2612e1cb44d7ce4df9f28a4] [formerly f5cb9e7af3ab483dd37a48ed1148ed97d849d407]
Former-commit-id: 422066d60a5a8aa3b1019c62b093ccad1051dfe5
Former-commit-id: 68cee1d9c297d366104f08efc1d56a20e4ceb00f
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy