code: public void removeAllDispatchablesForTransaction(int clientId) {
          if (tc.isEntryEnabled())
              SibTr.entry(this, tc, "removeAllDispatchablesForTransaction", clientId);
  
          idToFirstLevelEntryMap.remove(clientId);
  
          if (tc.isEntryEnabled())
              SibTr.exit(this, tc, "removeAllDispatchablesForTransaction");
      }
docs: In the event that the connection is going down, we need to ensure that the dispatchable
  table is cleared of all references to transactions that were created by that connection.
  
  @param clientId