grpc_server_refactoring.go

// filepath server/server.go
package server

type Server struct {}

// filepath server/foo/subserver.go
package foo

type subserver struct {
  server.Server
}

func (s *subserver) FooRPC() {
}

// filepath server/bar/subserver.go
package bar

type subserver struct {
  server.Server
}

func (s *subserver) BarRPC() {
}