code: def send_cmd(self, command, connId='default'):
          
          thisConn = self.__getConnection(connId)
          outputMsg = ""
          try:
              outputMsg += str(thisConn.sendcmd(command))
          except ftplib.all_errors as e:
              raise FtpLibraryError(str(e))
          if self.printOutput:
              logger.info(outputMsg)
          return outputMsg
docs: Sends any command to FTP server. Returns server output.
          Parameters:
          - command - any valid command to be sent (invalid will result in exception).
          - connId(optional) - connection identifier. By default equals 'default'
          Example:
          | send cmd | HELP |