code: public Conversation viewConversation(final String id) throws NotFoundException, GeneralException, UnauthorizedException {
          if (id == null) {
              throw new IllegalArgumentException("Id must be specified");
          }
          String url = CONVERSATIONS_BASE_URL + CONVERSATION_PATH;
          return messageBirdService.requestByID(url, id, Conversation.class);
      }
docs: Gets a single conversation.
  
  @param id Conversation to retrieved.
  @return The retrieved conversation.