class ActiveModel::Serializer::Associations::Config

def find_serializable(object)
  if target_serializer
    target_serializer.new(object, source_serializer.options)
  elsif object.respond_to?(:active_model_serializer) && (ams = object.active_model_serializer)
    ams.new(object, source_serializer.options)
  else
    object
  end
end