docs: @Override
    public final void setFor(final String pThing,
      final Class<?> pCls, final String pFldNm) {
      try {
      this.mngSettings.lazFldSts(pCls, pFldNm)
        .put(this.settingName, pThing);
      } catch (Exception e) {
        throw new RuntimeException(
          "Can't set class/field/setting: " + pCls + "/"
            + pFldNm + "/" + pThing, e);
      }
    }