public static CancellationToken ToCancellationToken <T>(this UniTask <T> task, CancellationToken linkToken)
 {
     return(ToCancellationToken(task.AsUniTask(), linkToken));
 }
 public static CancellationToken ToCancellationToken <T>(this UniTask <T> task)
 {
     return(ToCancellationToken(task.AsUniTask()));
 }