code: func (u *URI) LastPathSegment() []byte {
  	path := u.Path()
  	n := bytes.LastIndexByte(path, '/')
  	if n < 0 {
  		return path
  	}
  	return path[n+1:]
  }
docs: // LastPathSegment returns the last part of uri path after '/'.
  //
  // Examples:
  //
  //    * For /foo/bar/baz.html path returns baz.html.
  //    * For /foo/bar/ returns empty byte slice.
  //    * For /foobar.js returns foobar.js.