code: public Observable<ComapiResult<ConversationDetails>> getConversation(@NonNull final String conversationId) {
  
          final String token = getToken();
  
          if (sessionController.isCreatingSession()) {
              return getTaskQueue().queueGetConversation(conversationId);
          } else if (TextUtils.isEmpty(token)) {
              return Observable.error(getSessionStateErrorDescription());
          } else {
              return doGetConversation(token, conversationId);
          }
      }
docs: Returns observable to create a conversation.
  
  @param conversationId ID of a conversation to obtain.
  @return Observable to to create a conversation.