code: func List(c *messagebird.Client) (*HLRList, error) {
  	hlrList := &HLRList{}
  	if err := c.Request(hlrList, http.MethodGet, path, nil); err != nil {
  		return nil, err
  	}
  
  	return hlrList, nil
  }
docs: // List all HLR objects that were previously created by the Create function.