Imports
- github.com/golang/protobuf/proto
- github.com/golang/protobuf/ptypes/empty
- github.com/golang/protobuf/ptypes
- google.golang.org/api/option
- google.golang.org/genproto/googleapis/rpc/status
- google.golang.org/genproto/googleapis/rpc/errdetails
- github.com/golang/protobuf/ptypes/struct
- google.golang.org/genproto/googleapis/spanner/admin/instance/v1
- google.golang.org/grpc/codes
- google.golang.org/grpc/status
- github.com/golang/protobuf/ptypes/timestamp
- google.golang.org/grpc
- google.golang.org/genproto/googleapis/spanner/v1