Flutter 我无法找到修复此错误的位置，指出无法使用静态访问来访问实例成员

我收到了这个错误

无法使用静态访问访问实例成员

我找不到位置，因为我在另一个类中有与错误相关的数据.我刚开始学dart ，还在学习，所以这一切对我来说都没有多大意义.

我收到此错误的代码为.getLocationWeather():

 void getLocationData() async {
    var weatherData = await WeatherModel.getLocationWeather();

    Navigator.push(context, MaterialPageRoute(builder: (context) {
      return LocationScreen(
        locationWeather: weatherData,
      );

下面是getLlocationWeather()所在的类的代码.

import 'location.dart';
import 'networking.dart';

const apiKey = 'e72ca729af228beabd5d20e3b7749713';
const openWeatherMapURL = 'https://api.openweathermap.org/data/2.5/weather';

class WeatherModel {
  Future<dynamic> getCityWeather(String cityName) async {
    NetworkHelper networkHelper = NetworkHelper(
        '$openWeatherMapURL?q=$cityName&appid=$apiKey&units=metric');

    var weatherData = await networkHelper.getData();
    return weatherData;
  }

  Future<dynamic> getLocationWeather() async {
    Location location = Location();
    await location.getCurrentLocation();

    NetworkHelper networkHelper = NetworkHelper(
        '$openWeatherMapURL?lat=${location.latitude}&lon=${location.longitude}&appid=$apiKey&units=metric');

    var weatherData = await networkHelper.getData();
    return weatherData;
  }