# File lib/bson/bson_ruby.rb, line 415
    def serialize_dbref_element(buf, key, val) # this does NOT use the BSON "\x0C" DBPointer type
      oh = BSON::OrderedHash.new
      oh['$ref'] = val.namespace
      oh['$id'] = val.object_id
      serialize_object_element(buf, key, oh, false)
    end