Call internal function.

        :param call_conf:
        :return:

def _internal_function_call(self, call_conf):
        '''
        Call internal function.

        :param call_conf:
        :return:
        '''
        def stub(*args, **kwargs):
            message = 'Function {} is not available'.format(call_conf['fun'])
            self.out.error(message)
            log.debug(
                'Attempt to run "%s" with %s arguments and %s parameters.',
                call_conf['fun'], call_conf['arg'], call_conf['kwargs']
            )
            return message

        return getattr(salt.cli.support.intfunc,
                       call_conf['fun'], stub)(self.collector,
                                               *call_conf['arg'],
                                               **call_conf['kwargs'])