make into conc class
make into conc class


Former-commit-id: 9d05c7a21d50958f64bf3daafe6638f94b96a656 [formerly 6563a91c86b573e1d1988df7f6ea7797cad37d9f]
Former-commit-id: 58d5e6afc118273030946b663f4345021e2aaf06
interrogator/corpkit,interrogator/corpkit