code: public void start() {
          logger.info("----------------------------"); //$NON-NLS-1$
          logger.info(Messages.i18n.format("StorageImportDispatcher.StartingImport")); //$NON-NLS-1$
  
          policyDefIndex.clear();
          currentOrg = null;
          currentPlan = null;
          currentApi = null;
          currentClient = null;
          currentClientVersion = null;
          contracts.clear();
          apisToPublish.clear();
          clientsToRegister.clear();
          gatewayLinkCache.clear();
  
          try {
              this.storage.beginTx();
          } catch (StorageException e) {
              throw new RuntimeException(e);
          }
      }
docs: Starts the import.