code: @Weight(value = Weight.Unit.VARIABLE, comment = "Depends on the current call stack depth")
    public static void processDeferredActions() {
      final int stackDepth = ThreadUtils.stackDepth();
  
      final List<Deferred> list = REGISTRY.get();
      final Iterator<Deferred> iterator = list.iterator();
  
      while (iterator.hasNext()) {
        final Deferred deferred = iterator.next();
        if (deferred.getStackDepth() >= stackDepth) {
          try {
            deferred.executeDeferred();
          } catch (Exception ex) {
            final UnexpectedProcessingError error = new UnexpectedProcessingError("Error during deferred action processing", ex);
            MetaErrorListeners.fireError(error.getMessage(), error);
          } finally {
            iterator.remove();
          }
        }
      }
      if (list.isEmpty()) {
        REGISTRY.remove();
      }
    }
docs: Process all defer actions for the current stack depth level.
  
  @since 1.0