code: public Checkbox setEnabledValueString(String value) {
          boolean checked = this.isChecked();//Maintain checked status
          this.setProperty("value", value);
          this.setChecked(checked);
          return this;
      }
docs: Sets the value string considered as checked/enabled.
  Maintains the checked status considering the current value enabled string.
  @param value Checked value, {@code DEFAULT_ENABLED_VALUE} by default
  @return This element