/// <summary>
 /// Return a pointer to the unmanaged version of this callback.
 /// </summary>
 /// <param name="callback">The callback.</param>
 /// <returns>A pointer to a shadow c++ callback</returns>
 public static IntPtr ToIntPtr(SampleGrabberSinkCallback2 callback)
 {
     return(ToCallbackPtr <SampleGrabberSinkCallback2>(callback));
 }
 /// <summary>
 /// Return a pointer to the unmanaged version of this callback.
 /// </summary>
 /// <param name="callback">The callback.</param>
 /// <returns>A pointer to a shadow c++ callback</returns>
 public static IntPtr ToIntPtr(SampleGrabberSinkCallback2 callback)
 {
     return ToCallbackPtr<SampleGrabberSinkCallback2>(callback);
 }