15 lines
		
	
	
		
			299 B
		
	
	
	
		
			Dart
		
	
	
	
	
	
		
		
			
		
	
	
			15 lines
		
	
	
		
			299 B
		
	
	
	
		
			Dart
		
	
	
	
	
	
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								abstract class NativeHandler {
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								  bool onEvent(Map<String, dynamic> evt);
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								}
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								class NativeUiHandler extends NativeHandler {
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								  NativeUiHandler._();
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								  static NativeUiHandler instance = NativeUiHandler._();
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								  @override
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								  bool onEvent(Map<String, dynamic> evt) {
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								      throw UnimplementedError();
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								  }
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								}
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