code: public CustomIcon getIconByUuid(UUID uuid) {
          for (CustomIcon customIcon : customIconList) {
              if (customIcon.getUuid() != null && customIcon.getUuid().compareTo(uuid) == 0) {
                  return customIcon;
              }
          }
  
          return null;
      }
docs: Retrieves a custom icon based on its uuid.
  
  @param uuid
  the uuid which should be searched
  @return the custom icon if found, null otherwise