docs: protected final CnvIbnDoubleToCv
      createPutCnvIbnDoubleToCv() throws Exception {
      CnvIbnDoubleToCv convrt = new CnvIbnDoubleToCv();
      this.convertersMap
        .put(CnvIbnDoubleToCv.class.getSimpleName(), convrt);
      return convrt;
    }