sample

type Envelope struct {
	Message string     `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
	Details *anypb.Any `protobuf:"bytes,2,opt,name=details,proto3" json:"details,omitempty"`
	// contains filtered or unexported fields
}

type Message struct {
	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
	Age  int32  `protobuf:"varint,2,opt,name=age,proto3" json:"age,omitempty"`
	// contains filtered or unexported fields
}