android13/external/nanopb-c/tests/regression/issue_380/manglenames.proto

syntax = "proto2";
package A;

message A {
    message B {
        optional uint32 val = 1;
    }
    optional B b = 1;
}

message AP {
    message B {
        optional uint32 val = 1;
    }
    optional B m = 1;
}