def METHOD_NAME(self, keyid, keyserver=None):
    """
    This function adds imports repository keys from keyserver.
    default keyserver is hkp://keyserver.ubuntu.com
    user can provide other keyserver with keyserver="hkp://xyz"
    """
    try:
        WOShellExec.cmd_exec(
            self, "apt-key adv --keyserver {serv}"
            .format(serv=(keyserver or
                          "hkp://keyserver.ubuntu.com")) +
            " --recv-keys {key}".format(key=keyid))
    except Exception as e:
        Log.debug(self, "{0}".format(e))
        Log.error(self, "Unable to import repo key")