lib/xos-genx/xos-genx-tests/xproto/filtertest.xproto

option app_label = "core";

message Model1 {
    optional string somefield = 1;
}

message Model2 {
    optional string somefield = 2;
}

message Model3 {
    option app_label = "someservice";
    optional string somefield = 3;
}