# File lib/rmail/address.rb, line 145
    def comments=(comments)
      case comments
      when nil
        @comments = comments
      when Array
        @comments = comments
      when String
        @comments = [ comments ]
      else
        raise TypeError, "Argument to RMail::Address#comments= must be " +
          "String, Array or nil, was #{comments.type}."
      end
      @comments.freeze
    end