code: public static <REACTOR extends ReactBuilder> ReactPool<REACTOR> elasticPool(final Supplier<REACTOR> supplier) {
          return new ReactPool<>(
                                 supplier);
  
      }
docs: If all REACTORs are in use calling react will create a new REACTOR to handle the extra demand.
  
  Generate an elastic pool of REACTORs
  
  @param supplier To create new REACTORs
  @return ReactPool