code: func Lookup(ctx context.Context, section string, out interface{}) (bool, error) {
  	data, _ := getCurrent(ctx).sections[section]
  	if data == nil {
  		return false, nil
  	}
  	return true, json.Unmarshal(*data, out)
  }
docs: // Lookup retrieves the current section from the current LUCI_CONTEXT, and
  // deserializes it into out. Out may be any target for json.Unmarshal. It
  // returns a deserialization error (if any), and a boolean indicating if the
  // section was actually found.