def _attachments(cmd, *args)
      requires_version(cmd, 3.6)

      raise ArgumentError, "Invalid parameters" unless args[0].kind_of?(Hash)

      @iface.call(cmd, args[0])
    end
def _attachments(cmd, *args)
      requires_version(cmd, 3.6)

      raise ArgumentError, "Invalid parameters" unless args[0].kind_of?(Hash)

      @iface.call(cmd, args[0])
    end
def _legal_values