def trusted=(val)
      if ! [ true, false ].include?(val)
        raise ArgumentError, "value must be a boolean"
      end
      @o_dev[I_DEVICE]['Trusted'] = val
    end
def trusted=(val)
      if ! [ true, false ].include?(val)
        raise ArgumentError, "value must be a boolean"
      end
      @o_dev[I_DEVICE]['Trusted'] = val
    end
Indicates if the remote is seen as trusted. This
 setting can be changed by the application.
 @param val [Boolean]
 @return [void]