SdlClipboardDataCallbackDart typedef
        SdlClipboardDataCallbackDart =
     Pointer<NativeType>  Function(Pointer<NativeType>  userdata, Pointer<Utf8>  mimeType, Pointer<Uint32>  size)
    
    
    
Implementation
typedef SdlClipboardDataCallbackDart =
    Pointer<NativeType> Function(
      Pointer<NativeType> userdata,
      Pointer<Utf8> mimeType,
      Pointer<Uint32> size,
    );