How to use the ganga.GangaCore.Lib.LCG.Grid.__get_lfc_host__ function in ganga

self.__setup_sandboxcache__(job)

        uploadedFiles += self.sandboxcache.get_cached_files()

        lfc_host = None

        # for LCGSandboxCache, take the one specified in the sansboxcache object.
        # the value is exactly the same as the one from the local grid shell env. if
        # it is not specified exclusively.
        from GangaCore.Lib.LCG.LCGSandboxCache import LCGSandboxCache
        if isType(self.sandboxcache, LCGSandboxCache):
            lfc_host = self.sandboxcache.lfc_host

        # or in general, query it from the Grid object
        if not lfc_host:
            lfc_host = Grid.__get_lfc_host__()

        idx['lfc_host'] = lfc_host

        abspath = os.path.abspath(file)
        fsize = os.path.getsize(abspath)
        if fsize > config['BoundSandboxLimit']:

            md5sum = get_md5sum(abspath, ignoreGzipTimestamp=True)

            doUpload = True
            for uf in uploadedFiles:
                if uf.md5sum == md5sum:
                    # the same file has been uploaded to the iocache
                    idx['remote'][os.path.basename(file)] = uf.id
                    doUpload = False
                    break

def __setup_sandboxcache__(self, job):
        """Sets up the sandbox cache object to adopt the runtime configuration of the LCG backend"""

        re_token = re.compile('^token:(.*):(.*)$')

        self.sandboxcache.vo = config['VirtualOrganisation']
        self.sandboxcache.timeout = config['SandboxTransferTimeout']

        from GangaCore.Lib.LCG.LCGSandboxCache import LCGSandboxCache
        if isType(self.sandboxcache, LCGSandboxCache):
            if not self.sandboxcache.lfc_host:
                self.sandboxcache.lfc_host = Grid.__get_lfc_host__()

            if not self.sandboxcache.se:

                token = ''
                se_host = config['DefaultSE']
                m = re_token.match(se_host)
                if m:
                    token = m.group(1)
                    se_host = m.group(2)

                self.sandboxcache.se = se_host

                if token:
                    self.sandboxcache.srm_token = token

            if (self.sandboxcache.se_type in ['srmv2']) and (not self.sandboxcache.srm_token):