# File lib/rufus/json.rb, line 130
  def self.load_backend(*order)

    order =
      %w[ yajl oj jrjackson active_support json json/pure ] if order.empty?

    order.each do |lib|
      begin
        require(lib)
        Rufus::Json.backend = lib
        return lib
      rescue LoadError => le
      end
    end

    nil
  end