scope nonStaticNonPrimitiveFieldObjects.

static final Map<Class, L<Field>> #cache = dangerousWeakMap();

static L<Field> nonStaticNonPrimitiveFieldObjects(O o) {
  Class c = o.getClass();
  L<Field> fields;
  synchronized(cache) {
    fields = cache.get(c);
    if (fields == null)
      cache.put(c, fields = nonStaticNonPrimitiveFieldObjects_uncached(c));
  }
  ret fields;
}

end scope

Began life as a copy of #1018911