def method_missing(*args)
      method = args[0].to_s
      case args.length
        when 2
          k, v = method.delete('=').to_sym, args[1]
          add_attribute k, v
      end
    end
def method_missing(*args)
      method = args[0].to_s
      case args.length
        when 2
          k, v = method.delete('=').to_sym, args[1]
          add_attribute k, v
      end
    end
Captures the *instance* missing methods and converts it into instance attributes.