code: public String getEnabledValueString() {
          String valueEnabledString = this.getProperty("value");
          if (valueEnabledString == null) {
              valueEnabledString = DEFAULT_ENABLED_VALUE;
          }
  
          return valueEnabledString;
      }
docs: Returns the value string considered as checked/enabled.
  
  @return Checked value, {@code DEFAULT_ENABLED_VALUE} by default