docs: protected final CnvHasVersionToColumnsValues
      lazyGetCnvHasVersionToColumnsValues(
        final Class pBeanClass) throws Exception {
      @SuppressWarnings("unchecked")
      CnvHasVersionToColumnsValues<IHasVersion> convrt =
        (CnvHasVersionToColumnsValues<IHasVersion>)
          this.convertersMap.get(pBeanClass);
      if (convrt == null) {
        convrt = new CnvHasVersionToColumnsValues<IHasVersion>();
        convrt.setCnvObjectToColumnsValues(
          lazyGetCnvObjectToColumnsValues(pBeanClass));
        //assigning fully initialized object:
        this.convertersMap.put(pBeanClass, convrt);
      }
      return convrt;
    }