code: @Bean(ERRBUF_BEAN_NAME)
      public StringBuilder errbuf() {
          if (LOGGER.isDebugEnabled()) {
              LOGGER.debug("Create error buffer with size: {}.", PCAP_ERRBUF_SIZE);
          }
          return new StringBuilder(PCAP_ERRBUF_SIZE);
      }
docs: Error buffer.
  @return error buffer.