code: def __profile_definition(self, pipeline_name):
          
          pipe = self.flsh.Operations[pipeline_name]
          x_st = pipe.GetUserVariable(PROFILE_LENGTH_ST).Variable()
          x_non_st = pipe.GetUserVariable(PROFILE_LENGTH_NON_ST).Variable()
          timesteps = pipe.GetUserVariable(PROFILE_TIME).Variable()
          self.pipes[pipeline_name] = {'grid': x_st,
                                       'non_st_grid': x_non_st,
                                       'timesteps': timesteps,
                                       'data': {}
                                      }
          return pipe
docs: Prepare the profiles extraction from a specific profile