code: def get_tuid(self, branch, revision, file):
          
          service_response = wrap(self.get_tuids(branch, revision, [file]))
          for f, t in service_response.items():
              return t
docs: :param branch: BRANCH TO FIND THE REVISION/FILE
          :param revision: THE REVISION NUNMBER
          :param file: THE FULL PATH TO A SINGLE FILE
          :return: A LIST OF TUIDS