code: public static <T> boolean request(AtomicLongFieldUpdater<T> updater, T instance, long toAdd) {
  
          if (validate(toAdd)) {
              addCap(updater, instance, toAdd);
  
              return true;
          }
  
          return false;
      }
docs: Concurrent addition bound to Long.MAX_VALUE. Any concurrent write will "happen before" this operation.
  
  @param <T> the parent instance type
  @param updater current field updater
  @param instance current instance to update
  @param toAdd delta to add
  @return {@literal true} if the operation succeeded.
  @since 5.0.1