docs: public synchronized Collection<ContainerShutdownDescriptor> removeShutdownDescriptors(GavLabel gavLabel) {
          List<ContainerShutdownDescriptor> descriptors;
          if (gavLabel != null) {
              descriptors = removeFromPomLabelMap(gavLabel);
              removeFromPerContainerMap(descriptors);
          } else {
              // All entries are requested
              descriptors = new ArrayList<>(shutdownDescriptorPerContainerMap.values());
              clearAllMaps();
          }
  
          Collections.reverse(descriptors);
          return descriptors;
      }