tests/regression/issue_610/nanopb_generator_bug/first/a.proto

syntax="proto3";

package first;

import "nanopb_generator_bug/first/a/aa.proto";
import "nanopb_generator_bug/first/a/ab.proto";

message A {
    oneof oneof_a {
        a.A obj_a = 1;
        a.B obj_b = 2;
    }
}