@abc.abstractmethod<EOL><INDENT>def assign_agent_to_resource(self, agent_id, resource_id):<DEDENT>
pass<EOL>
Adds an existing ``Agent`` to a ``Resource``.

        :param agent_id: the ``Id`` of the ``Agent``
        :type agent_id: ``osid.id.Id``
        :param resource_id: the ``Id`` of the ``Resource``
        :type resource_id: ``osid.id.Id``
        :raise: ``AlreadyExists`` -- ``agent_id`` is already assigned to ``resource_id``
        :raise: ``NotFound`` -- ``agent_id`` or ``resource_id`` not found
        :raise: ``NullArgument`` -- ``agent_id`` or ``resource_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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