google-cloud-core >= 0.26.0, < 0.27dev
grpcio >= 1.2.0, < 2.0dev
gapic-google-cloud-spanner-v1 >= 0.15.0, < 0.16dev
gapic-google-cloud-spanner-admin-database-v1 >= 0.15.0, < 0.16dev
gapic-google-cloud-spanner-admin-instance-v1 >= 0.15.0, < 0.16dev
