docs: public static ExecutorService getExecutor(final boolean isOccupyThreadForPerConnection, final TransactionType transactionType, final ChannelId channelId) {
          return (isOccupyThreadForPerConnection || TransactionType.XA == transactionType || TransactionType.BASE == transactionType)
              ? ChannelThreadExecutorGroup.getInstance().get(channelId) : UserExecutorGroup.getInstance().getExecutorService();
      }