class ActiveModel::Serializer

def self.get_serializer_for(klass)
  return nil unless config.serializer_lookup_enabled
  serializers_cache.fetch_or_store(klass) do
    # NOTE(beauby): When we drop 1.9.3 support we can lazify the map for perfs.
    serializer_class = serializer_lookup_chain_for(klass).map(&:safe_constantize).find { |x| x && x < ActiveModel::Serializer }
    if serializer_class
      serializer_class
    elsif klass.superclass
      get_serializer_for(klass.superclass)
    end
  end
end