/// 资源类扩展方法
extension AssetExtension on String {
  static const String _assetImagePrefix = "assets/images/";

  /// 图片url
  String get assetImg => _assetImagePrefix + this;

  String get assetPng => '$assetImg.png';

  String get assetGif => '$assetImg.gif';
}

extension StringExtension on String {
  String get prefixColon => ':$this';
}