code: public Set<MongoNamespace> getSynchronizedNamespaces() {
      this.waitUntilInitialized();
      try {
        ongoingOperationsGroup.enter();
        return this.syncConfig.getSynchronizedNamespaces();
      } finally {
        ongoingOperationsGroup.exit();
      }
    }
docs: Returns the set of synchronized namespaces.
  
  @return the set of synchronized namespaces.