PFNGLSPECIALIZESHADERPROCDart typedef
        PFNGLSPECIALIZESHADERPROCDart =
     void Function(int shader, Pointer<Utf8>  pEntryPoint, int numSpecializationConstants, Pointer<Uint32>  pConstantIndex, Pointer<Uint32>  pConstantValue)
    
    
    
Implementation
typedef PFNGLSPECIALIZESHADERPROCDart =
    void Function(
      int shader,
      Pointer<Utf8> pEntryPoint,
      int numSpecializationConstants,
      Pointer<Uint32> pConstantIndex,
      Pointer<Uint32> pConstantValue,
    );