docs: public String getString()
      {
          Object objValue = null;
          if (this.getMessage() != null)
              objValue = this.getMessage().getNative(this.getFullKey(null));
          Class<?> classData = this.getRawClassType();
          try {
              return DataConverters.formatObjectToString(objValue, classData, this.getDefault());
          } catch (Exception ex) {
              return null;
          }
      }