google-gax>=0.15.7, <0.16dev
oauth2client>=2.0.0, <4.0dev
proto-google-cloud-spanner-admin-instance-v1[grpc]>=0.15.3, <0.16dev
googleapis-common-protos[grpc]>=1.5.2, <2.0dev
grpc-google-iam-v1>=0.11.1, <0.12dev
