@Override
  public Map<String, String> convertToEntityAttribute(String dbData) {
    return GSON.fromJson(dbData, TYPE);
  }
@Test
  void convertToEntityAttribute_null_oneElement() throws IOException {
    Map<String, String> map = new HashMap<>(8);
    map.put("a", "1");

    String content = readAllContentOf("json/converter/element.1.json");
    assertEquals(map, this.converter.convertToEntityAttribute(content));
  }