syntax="proto3";
package graph.nested;

message Foo {
    Bar x = 1; // usage before declaration

    // nested message
    message Bar {
        Baz a = 1; // usage before declaration

        // doubly nested enum
        enum Baz {VALUE = 0;}
        Baz b = 2; // usage after declaration

        // doubly nested message
        message Quux {}
        Quux c = 3;
    }

    Bar y = 2; // usage after declaration

    // same name, different scope
    enum Baz {VALUE = 0;}
    Baz shallow = 3;

    Bar.Baz deep = 4; // usage of deeply nested child enum
}