docs: public Dispatchable addDispatchableForLocalTransaction(int clientTransactionId) {
          if (tc.isEntryEnabled())
              SibTr.entry(this, tc, "addDispatchableForLocalTransaction", "" + clientTransactionId);
          if (idToFirstLevelEntryMap.containsKey(clientTransactionId)) {
              final SIErrorException exception = new SIErrorException(CommsConstants.TRANTODISPATCHMAP_ADDDISPATCHLOCALTX_01);
              FFDCFilter.processException(exception, CLASS_NAME + ".addDispatchableForLocalTransaction",
                                          CommsConstants.TRANTODISPATCHMAP_ADDDISPATCHLOCALTX_01,
                                          new Object[] { "" + clientTransactionId, idToFirstLevelEntryMap, this });
              if (tc.isEventEnabled())
                  SibTr.exception(this, tc, exception);
              throw exception;
          }
          LocalFirstLevelMapEntry entry = new LocalFirstLevelMapEntry();
          Dispatchable result = entry.getDispatchable();
          idToFirstLevelEntryMap.put(clientTransactionId, entry);
          if (tc.isEntryEnabled())
              SibTr.exit(this, tc, "addDispatchableForLocalTransaction", result);
          return result;
      }