code: func (c *Client) Delete(mr *Request) (err error) {
  	url := buildURL(c.apiBase, mr)
  	req, err := createRequest("DELETE", url, nil, nil)
  	if err != nil {
  		return err
  	}
  
  	c.Lock()
  	defer c.Unlock()
  	_, _, err = c.httpClient.Send(req).Call()
  	return err
  }
docs: // Delete is used to delete a resource.