/usr/share/gocode/src/google.golang.org/grpc/examples/ is in golang-google-grpc-dev 1.6.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/greeter_client/
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/greeter_client/main.go
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/greeter_server/
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/greeter_server/main.go
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/helloworld/
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/helloworld/helloworld.pb.go
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/helloworld/helloworld.proto
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/mock_helloworld/
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/mock_helloworld/hw_mock.go
/usr/share/gocode/src/google.golang.org/grpc/examples/helloworld/mock_helloworld/hw_mock_test.go
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/client/
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/client/client.go
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/mock_routeguide/
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/mock_routeguide/rg_mock.go
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/mock_routeguide/rg_mock_test.go
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/routeguide/
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/routeguide/route_guide.pb.go
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/routeguide/route_guide.proto
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/server/
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/server/server.go
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/testdata/
/usr/share/gocode/src/google.golang.org/grpc/examples/route_guide/testdata/route_guide_db.json