private boolean done() {
this.completedExceptionally = false;
this.done = true;
handleOnComplete(true);
return true;
}
private FastFuture<T> completeExceptionally(Throwable t) {
exception.lazySet(t);
completedExceptionally = true;
handleOnComplete(true);
if (pipeline != null && pipeline.onFail != null) pipeline.onFail.accept(t);
done = true;
return this;
}