code: def reflect(source, model, cache=None):
      '''Finds an object of class `model` with the same identifier as the
      `source` object'''
      if source is None:
          return None
      if cache and source in cache:
          return cache[source]
      db = object_session(source)
      ident = identity_key(instance=source)[1]
      assert ident is not None
      return db.query(model).get(identf reflect(source, model, cache=None):
      '''Finds an object of class `model` with the same identifier as the
      `source` object'''
      if source is None:
          return None
      if cache and source in cache:
          return cache[source]
      db = object_session(source)
      ident = identity_key(instance=source)[1]
      assert ident is not None
      return db.query(model).get(ident)
docs: Finds an object of class `model` with the same identifier as the
      `source` object