def colors
    config[:color] ||= {
      Numeric    => :red    ,
      String     => :green  ,
      Symbol     => :cyan   ,
      Array      => :blue   ,
      Hash       => :blue   ,
      NilClass   => :magenta,
      TrueClass  => :magenta,
      FalseClass => :magenta,
      Exception  => :magenta,
      Object     => :yellow }
  end
def colors
    config[:color] ||= {
      Numeric    => :red    ,
      String     => :green  ,
      Symbol     => :cyan   ,
      Array      => :blue   ,
      Hash       => :blue   ,
      NilClass   => :magenta,
      TrueClass  => :magenta,
      FalseClass => :magenta,
      Exception  => :magenta,
      Object     => :yellow }
  end
--------------- Plugin API ---------------