/// <summary>
 /// Register a callback function to receive eye camera related data when the module has new outputs.
 /// </summary>
 /// <param name="callback">function pointer of callback</param>
 /// <returns>error code. please refer Error in ViveSR_Enums.h.</returns>
 public static int WrapperRegisterEyeDataCallback(System.IntPtr callback)
 {
     return(SRanipal_Eye_API.RegisterEyeDataCallback(callback));
 }