CreateReq is to compose the request for creating an instance pool.

CreateResp to compose the response of creation request.

DeleteReq is to compose the request to delete an instance pool.

EditReq is to compose the request for modifying an instance pool.

GetReq is to compose the request to get an instance pool.

GetResp is to compose the response for the get instance pool request.

ListResp is to compose the response to list an array of instance pools' stats.