src/gn/format_test_data/102.gn

if (true) {
  if (true) {
    # you are adding //third_party/a_foo_b_deps:a_foo_b_support_*, use the a_foo_bx
    # version of the dep instead.
    # TODO(b/123456789): Use per-feature -keep rules in R8 once supported, then
    # this can be removed.
  }
}