code: def get_observation(self, observation_id):
          
          search = mp.ObservationSearch(observation_id=observation_id)
          b = search_observations_sql_builder(search)
          sql = b.get_select_sql(columns='l.publicId AS obstory_id, l.name AS obstory_name, '
                                         'o.obsTime, s.name AS obsType, o.publicId, o.uid',
                                 skip=0, limit=1, order='o.obsTime DESC')
          obs = list(self.generators.observation_generator(sql=sql, sql_args=b.sql_args))
          if not obs:
              return None
          return obs[0]
docs: Retrieve an existing :class:`meteorpi_model.Observation` by its ID
  
          :param string observation_id:
              UUID of the observation
          :return:
              A :class:`meteorpi_model.Observation` instance, or None if not found