How to use the @react-native-firebase/app/lib/common/deeps.deepGet function in @react-native-firebase/app

child(path) {
    if (!isString(path)) {
      throw new Error("snapshot().child(*) 'path' must be a string value");
    }

    let value = deepGet(this._snapshot.value, path);

    if (value === undefined) {
      value = null;
    }

    const childRef = this._ref.child(path);

    return new DatabaseDataSnapshot(childRef, {
      value,
      key: childRef.key,
      exists: value !== null,
      childKeys: isObject(value) ? Object.keys(value) : [],
    });
  }

hasChild(path) {
    if (!isString(path)) {
      throw new Error("snapshot.hasChild(*) 'path' must be a string value.");
    }

    return deepGet(this._snapshot.value, path) !== undefined;
  }