syntax = "proto3";

package test;

option;
option foo.bar;
option = 2;
option .(foo.bar).baz = 3;
option foo/(bar.baz).foo = 4;

message Foo {
    int32 x = 1 [
        .(foo.bar).baz = 3,
        foo/(bar.baz).foo = 4
    ];
    int32 y = 2 [];
}