How to use the solnlib.utils.escape_json_control_chars function in solnlib

def handleEdit(self, confInfo):
        logger.info("start edit setup configure.")
        scheme, host, port = utils.extract_http_scheme_host_port(scc.getMgmtUri())
        conf_mgr = conf.ConfManager(self.getSessionKey(), self.appName, scheme=scheme, host=host, port=port)
        ta_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_conf)
        customized_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_customized_conf)
        all_origin_settings = ta_conf_file.get_all()
        all_settings = utils.escape_json_control_chars(
            self.callerArgs.data[setup_const.all_settings][0])
        all_settings = json.loads(all_settings)
        # write global and proxy settings
        self._updateGlobalSettings(setup_const.global_settings, all_settings,
                                   all_origin_settings, ta_conf_file)
        # write customized settings
        customized_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_customized_conf)
        self._updateConfStanzas(all_settings.get(setup_const.myta_customized_settings, {}), customized_conf_file, self.encrypt_fields_customized)
        # write account credential settings
        for cred, conf_file in self.cred_confs:
            cred_conf_file = get_or_create_conf_file(conf_mgr, conf_file)
            creds = all_settings.get(cred, {})
            if creds == setup_const.ignore_backend_req:
                logger.info("Ignore backend rest request")
                continue
            if creds:

def handleEdit(self, confInfo):
        logger.info("start edit setup configure.")
        scheme, host, port = utils.extract_http_scheme_host_port(scc.getMgmtUri())
        conf_mgr = conf.ConfManager(self.getSessionKey(), self.appName, scheme=scheme, host=host, port=port)
        ta_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_conf)
        customized_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_customized_conf)
        all_origin_settings = ta_conf_file.get_all()
        all_settings = utils.escape_json_control_chars(
            self.callerArgs.data[setup_const.all_settings][0])
        all_settings = json.loads(all_settings)
        # write global and proxy settings
        self._updateGlobalSettings(setup_const.global_settings, all_settings,
                                   all_origin_settings, ta_conf_file)
        # write customized settings
        customized_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_customized_conf)
        self._updateConfStanzas(all_settings.get(setup_const.myta_customized_settings, {}), customized_conf_file, self.encrypt_fields_customized)
        # write account credential settings
        for cred, conf_file in self.cred_confs:
            cred_conf_file = get_or_create_conf_file(conf_mgr, conf_file)
            creds = all_settings.get(cred, {})
            if creds == setup_const.ignore_backend_req:
                logger.info("Ignore backend rest request")
                continue
            if creds:

# read account credential settings
        for cred, cred_conf in self.cred_confs:
            cred_conf_file = get_or_create_conf_file(conf_mgr, cred_conf)
            creds = cred_conf_file.get_all()
            if creds:
                self._setNoneValues(creds)
                all_settings.update({cred: creds})
        # customized conf
        customized_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_customized_conf)
        settings = customized_conf_file.get_all()
        all_settings[setup_const.myta_customized_settings] = settings

        self._clearPasswords(all_settings, self.cred_fields)
        all_settings = filter_eai_property(all_settings)
        all_settings = json.dumps(all_settings)
        all_settings = utils.escape_json_control_chars(all_settings)
        confInfo[setup_const.myta_settings].append(setup_const.all_settings, all_settings)
        logger.info("list setup configure is done.")

# read account credential settings
        for cred, cred_conf in self.cred_confs:
            cred_conf_file = get_or_create_conf_file(conf_mgr, cred_conf)
            creds = cred_conf_file.get_all()
            if creds:
                self._setNoneValues(creds)
                all_settings.update({cred: creds})
        # customized conf
        customized_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_customized_conf)
        settings = customized_conf_file.get_all()
        all_settings[setup_const.myta_customized_settings] = settings

        self._clearPasswords(all_settings, self.cred_fields)
        all_settings = filter_eai_property(all_settings)
        all_settings = json.dumps(all_settings)
        all_settings = utils.escape_json_control_chars(all_settings)
        confInfo[setup_const.myta_settings].append(setup_const.all_settings, all_settings)
        logger.info("list setup configure is done.")