docs: protected final CnvTfsString
      lazyGetCnvTfsString() throws Exception {
      CnvTfsString convrt = (CnvTfsString) this.convertersMap
        .get(CnvTfsString.class.getSimpleName());
      if (convrt == null) {
        convrt = new CnvTfsString();
        this.convertersMap.put(CnvTfsString.class.getSimpleName(), convrt);
      }
      return convrt;
    }