@abc.abstractmethod<EOL><INDENT>def set_priority(self, priority):<DEDENT>
pass<EOL>
Sets the priority.

        :param priority: the new priority
        :type priority: ``cardinal``
        :raise: ``InvalidArgument`` -- ``priority`` is invalid
        :raise: ``NoAccess`` -- ``priority`` cannot be modified

        *compliance: mandatory -- This method must be implemented.*