docs: def _getMessage(session, txid):
      """Getting message associated with txid"""
  
      while True:
          if txid in session.messages:
              msg = session.messages[txid]
              del session.messages[txid]
              return msg
          else:
              try:
                  # apparently any timeout at all allows the thread to be
                  # stopped but none make it unstoppable with ctrl+c
                  nextMessage = session.queue.get(timeout=100)
              except queue.Empty:
                  continue
              if 'txid' in nextMessage:
                  session.messages[nextMessage['txid']] = nextMessage
              else:
                  logger.info("message with no txid: %s" % nextMessage)