docs: protected final CnvBnRsToString<RS>
      createPutCnvBnRsToString() throws Exception {
      CnvBnRsToString<RS> convrt = new CnvBnRsToString<RS>();
      //assigning fully initialized object:
      this.convertersMap
        .put(CnvBnRsToString.class.getSimpleName(), convrt);
      return convrt;
    }