PFNGLSIGNALSEMAPHOREUI64NVXPROCDart typedef
        PFNGLSIGNALSEMAPHOREUI64NVXPROCDart =
     void Function(int signalGpu, int fenceObjectCount, Pointer<Uint32>  semaphoreArray, Pointer<Uint64>  fenceValueArray)
    
    
    
Implementation
typedef PFNGLSIGNALSEMAPHOREUI64NVXPROCDart =
    void Function(
      int signalGpu,
      int fenceObjectCount,
      Pointer<Uint32> semaphoreArray,
      Pointer<Uint64> fenceValueArray,
    );