Return a list of symlinked files and dirs

def symlink_list(self, load):
        '''
        Return a list of symlinked files and dirs
        '''
        if 'env' in load:
            # "env" is not supported; Use "saltenv".
            load.pop('env')

        ret = {}
        if 'saltenv' not in load:
            return {}
        if not isinstance(load['saltenv'], six.string_types):
            load['saltenv'] = six.text_type(load['saltenv'])

        for fsb in self.backends(load.pop('fsbackend', None)):
            symlstr = '{0}.symlink_list'.format(fsb)
            if symlstr in self.servers:
                ret = self.servers[symlstr](load)
        # some *fs do not handle prefix. Ensure it is filtered
        prefix = load.get('prefix', '').strip('/')
        if prefix != '':
            ret = dict([
                (x, y) for x, y in six.iteritems(ret) if x.startswith(prefix)
            ])
        return ret