the proto file I now define is as follows

syntax = "proto2";
message Test1 {}
message Test2 {
    required  Test1 test1 = 1;
}
message Test3 {
    required Test2 test2 = 1;
}

then I will get a go file with the approximate content

type Test3 {
    Test2 *Test2 
}

type Test2 {
    Test1 *Test1
}

type Test1 {}

then when I use it, it will be very troublesome

var test3 = new(Test3)
test3.Test2 = new(Test2) // 
test3.Test2.Test1 = new(Test1) // 
fmt.Printf(test3.Test2.Test1) // 

as shown above, I have to initialize many times in order to use Test1. Because of business problems, there may be four or five levels. This is too troublesome for coding. What I can think of now is that there are two ideas

1. found a way to initialize the pointer itself once and for all.
2. find out whether protobuf has a method that does not generate pointers but only structures, or whether protobuf has a function to generate the first idea

but for these two roads are not through, please give us your advice.