public boolean isArrayType(String group, String key) {
    int type = getType(group, key);
    switch (type) {
    case Registry.TYPE_STRING_ARRAY:
    case Registry.TYPE_OBJECT_ARRAY:
    case Registry.TYPE_BYTE_ARRAY:
    case Registry.TYPE_CHAR_ARRAY:
    case Registry.TYPE_INT_ARRAY:
      return true;
    default:
      return false;
    }
  }