How to use the react-native-config.BLE_LOG_LEVEL function in react-native-config

listen(({ type, message, ...rest }) => {
    if (Object.keys(rest).length) {
      console.log(`${type}: ${message || ""}`, rest); // eslint-disable-line no-console
    } else {
      console.log(`${type}: ${message || ""}`); // eslint-disable-line no-console
    }
  });
}

if (Config.DEBUG_SOCKET) {
  logs.subscribe(e => {
    console.log(e); // eslint-disable-line no-console
  });
}

if (Config.BLE_LOG_LEVEL) BluetoothTransport.setLogLevel(Config.BLE_LOG_LEVEL);

setNetwork(network);
setEnv("FORCE_PROVIDER", Config.FORCE_PROVIDER);

// Add support of HID (experimental until we stabilize it)

registerTransportModule({
  id: "hid",

  // prettier-ignore
  open: id => { // eslint-disable-line consistent-return
    if (id.startsWith("usb|")) {
      const devicePath = JSON.parse(id.slice(4));
      return retry(() => HIDTransport.open(devicePath), { maxRetry: 2 });
    }
  },

import { receiveAPDU } from "./receiveAPDU";
import { monitorCharacteristic } from "./monitorCharacteristic";
import { awaitsBleOn } from "./awaitsBleOn";

const ServiceUuid = "d973f2e0-b19e-11e2-9e96-0800200c9a66";
const WriteCharacteristicUuid = "d973f2e2-b19e-11e2-9e96-0800200c9a66";
const NotifyCharacteristicUuid = "d973f2e1-b19e-11e2-9e96-0800200c9a66";

let connectOptions = {
  requestMTU: 156,
};

const transportsCache = {};
const bleManager = new BleManager();

if (Config.BLE_LOG_LEVEL) bleManager.setLogLevel(Config.BLE_LOG_LEVEL);

/**
 * react-native bluetooth BLE implementation
 * @example
 * import BluetoothTransport from "@ledgerhq/react-native-hw-transport-ble";
 */
export default class BluetoothTransport extends Transport {
  static isSupported = (): Promise =>
    Promise.resolve(typeof BleManager === "function");

  /**
   * TODO could add this concept in all transports
   * observe event with { available: bool, type: string } // available is generic, type is specific
   * an event is emit once and then listened
   */
  static observeState(observer: *) {