func (e *Entry) traverse(method, urlStr string) (*Route, []string) {
	for _, entry := range e.entries {
		if h, params := entry.exec(method, urlStr); h != nil {
			return h, params
		}
	}
	return nil, nil
}
func (e *Entry) traverse(method, urlStr string) (*Route, []string) {
	for _, entry := range e.entries {
		if h, params := entry.exec(method, urlStr); h != nil {
			return h, params
		}
	}
	return nil, nil
}
func ( e * Entry ) traverse ( method , urlStr string ) ( * Route , [ ] string ) { for _ , entry := range e . entries { if h , params := entry . exec ( method , urlStr ) ; h != nil { return h , params } } return nil , nil }
// traverse tries matches to child entries.
traverse tries matches to child entries .