How to use the @react-native-community/async-storage.mergeItem function in @react-native-community/async-storage

name,
      age,
      traits: {trait1, trait2},
    } = this.state;

    const obj = {
      name,
      age,
      traits: {
        trait1,
        trait2,
      },
    };

    try {
      await AsyncStorage.mergeItem(KEY, JSON.stringify(obj));
    } catch (e) {
      console.warn(e);
    }

    this.setState({needRestart: true});
  };

  mergeItem: key => AsyncStorage.mergeItem(key),
  flushGetRequests: () => AsyncStorage.flushGetRequests(),