@SuppressWarnings("unchecked")
	@Nullable
	public static <T> QueueSubscription<T> as(Subscription s) {
		if (s instanceof QueueSubscription) {
			return (QueueSubscription<T>) s;
		}
		return null;
	}
@SuppressWarnings("unchecked")
	@Nullable
	public static <T> QueueSubscription<T> as(Subscription s) {
		if (s instanceof QueueSubscription) {
			return (QueueSubscription<T>) s;
		}
		return null;
	}
@ SuppressWarnings ( "unchecked" ) @ Nullable public static < T > QueueSubscription < T > as ( Subscription s ) { if ( s instanceof QueueSubscription ) { return ( QueueSubscription < T > ) s ; } return null ; }
Returns the subscription as QueueSubscription if possible or null.
@param <T> the value type of the QueueSubscription.
@param s the source subscription to try to convert.
@return the QueueSubscription instance or null
Returns the subscription as QueueSubscription if possible or null .