# File lib/tf/plugins.rb, line 40
  def load wanted
    [ :input, :test, :output ].each do |type|
      _list = list(type)
      if ! wanted.include?("all") && ! wanted.include?("all_#{type}")
        _list = _list.select{|item, klass, _type| wanted.include?(klass) }
      end
      _list.each{|item, klass, _type|
        klass = TF.const_get(klass)
        instance_variable_get("@#{type}_plugins".to_sym) << klass.new
      }
    end
  end