PFNGLGETTRANSFORMFEEDBACKVARYINGEXTPROCDart typedef
        PFNGLGETTRANSFORMFEEDBACKVARYINGEXTPROCDart =
     void Function(int program, int index, int bufSize, Pointer<Uint32>  length, Pointer<Uint32>  size, Pointer<Uint32>  type, Pointer<Int8>  name)
    
    
    
Implementation
typedef PFNGLGETTRANSFORMFEEDBACKVARYINGEXTPROCDart =
    void Function(
      int program,
      int index,
      int bufSize,
      Pointer<Uint32> length,
      Pointer<Uint32> size,
      Pointer<Uint32> type,
      Pointer<Int8> name,
    );