code: func NewGorillaPathPrefix(pattern string) (*GorillaPathPrefix, error) {
  	regexpPattern, err := gorillaPattern(pattern, false, true, false)
  	if err != nil {
  		return nil, err
  	}
  	r, err := CompileRegexp(regexpPattern)
  	if err != nil {
  		return nil, err
  	}
  	return &GorillaPathPrefix{*r}, nil
  }
docs: // GorillaPathPrefix ----------------------------------------------------------