docs: @Nullable
      public String getDescription(int tagType)
      {
          Object object = _directory.getObject(tagType);
  
          if (object == null)
              return null;
  
          // special presentation for long arrays
          if (object.getClass().isArray()) {
              final int length = Array.getLength(object);
              if (length > 16) {
                  return String.format("[%d values]", length);
              }
          }
  
          if (object instanceof Date) {
              // Produce a date string having a format that includes the offset in form "+00:00"
              return new SimpleDateFormat("EEE MMM dd HH:mm:ss Z yyyy")
                  .format((Date) object)
                  .replaceAll("([0-9]{2} [^ ]+)$", ":$1");
          }
  
          // no special handling required, so use default conversion to a string
          return _directory.getString(tagType);
      }