code: public static <T> Subscription scalarSubscription(CoreSubscriber<? super T> subscriber,
  			T value){
  		return new ScalarSubscription<>(subscriber, value);
  	}
docs: Represents a fuseable Subscription that emits a single constant value synchronously
  to a Subscriber or consumer.
  
  @param subscriber the delegate {@link Subscriber} that will be requesting the value
  @param value the single value to be emitted
  @param <T> the value type
  @return a new scalar {@link Subscription}