How to use the react-native-image-marker.markImage function in react-native-image-marker

_markByPosition = (type) => {
    this._showLoading()
    if (this.state.markImage) {
      Marker.markImage({
        src: this.state.image,
        markerSrc: this.state.markImage,
        position: type,
        scale: 1,
        markerScale: 1,
        quality: 100,
        saveFormat: this.state.saveFormat
      }).then((path) => {
        this.setState({
          uri: this.state.saveFormat === ImageFormat.base64 ? path : Platform.OS === 'android' ? 'file://' + path : path,
          show: true,
          loading: false
        })
      }).catch((err) => {
        console.log('====================================')
        console.log(err, 'err')