anchor.diff:  
       // This is exposed as dart:core's Duration
       'Windows.Foundation.TimeSpan',
  +
  +    ...excludedInterfaces,
  +  };
  +
  +  /// The WinRT interfaces to exclude when generating the implements mappers.
  +  static const excludedInterfaces = <String>{
  +    // INumberFormatter2's methods conflict with INumberFormatter's methods
  +    'Windows.Globalization.NumberFormatting.INumberFormatter2',
  +    // Contains deprecated APIs
  +    'Windows.Storage.Pickers.IFileOpenPicker2',
  +    // IFileOpenPickerWithOperationId's pickSingleFileAsync(String operationId)
  +    // method conflicts with IFileOpenPicker's pickSingleFileAsync() method
  +    'Windows.Storage.Pickers.IFileOpenPickerWithOperationId',
     };
   
     @override
     String getImportForTypeDef(TypeDef typeDef) {
       if (typeDef.name.isEmpty ||
           this.typeDef.name == typeDef.name ||
  -        ignoredWinRTTypes.contains(typeDef.name)) {
  +        ignoredWindowsRuntimeTypes.contains(typeDef.name)) {
         return '';
       }
   
  
positive.code:   ''';
  
    List<TypeDef> get implementsInterfaces => typeDef.interfaces
      // Generic collections' typeDef returns an empty name and that breaks lots
      // of things. We need to ignore them for now
      ..removeWhere((interface) => interface.name.isEmpty);
  
negative.code:   String get relativePathToSrcDir => relativePathToSrcDirectory(File(
        '../../lib/src/winrt/${folderFromWinRTType(typeDef.name)}/$shortName.dart'));
  
    /// The WinRT types to ignore when generating the imports.
    static const ignoredWindowsRuntimeTypes = <String>{
      // This is exposed as dart:core's DateTime
      'Windows.Foundation.DateTime',
  
  