code: public ConversationMessage viewConversationMessage(final String messageId)
              throws NotFoundException, GeneralException, UnauthorizedException {
          String url = CONVERSATIONS_BASE_URL + CONVERSATION_MESSAGE_PATH;
          return messageBirdService.requestByID(url, messageId, ConversationMessage.class);
      }
docs: Gets a single message.
  
  @param messageId Message to retrieve.
  @return The retrieved message.