def get_next_agent(self):
<EOL>return next(self)<EOL>
Gets the next ``Agent`` in this list.

        return: (osid.authentication.Agent) - the next ``Agent`` in this
                list. The ``has_next()`` method should be used to test
                that a next ``Agent`` is available before calling this
                method.
        raise:  IllegalState - no more elements available in this list
        raise:  OperationFailed - unable to complete request
        *compliance: mandatory -- This method must be implemented.*