code: private ConversationContext getConversationContext(String id) {
          if (conversationContext == null) {
              synchronized (this) {
                  if (conversationContext == null) {
                      Container container = Container.instance(id);
                      conversationContext = container.deploymentManager().instance().select(HttpConversationContext.class).get();
                  }
              }
          }
          return conversationContext;
      }
docs: Get conversation context.
  
  @return the conversation context