You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: dircache.go
    path of file: ./repos/rclone/lib/dircache
    
    the code of the file until where you have to start completion: // Package dircache provides a simple cache for caching directory ID
// to path lookups and the inverse.
pac
    
func (dc *DirCache) String() string {
	dc.cacheMu.RLock()
	defer dc.cacheMu.RUnlock()
	var buf bytes.Buffer
	_, _ = buf.WriteString("DirCache{\n")
	_, _ = fmt.Fprintf(&buf, "\ttrueRootID: %q,\n", dc.trueRootID)
	_, _ = fmt.Fprintf(&buf, "\troot: %q,\n", dc.root)
	_, _ = fmt.Fprintf(&buf, "\trootID: %q,\n", dc.rootID)
	_, _ = fmt.Fprintf(&buf, "\trootParentID: %q,\n", dc.rootParentID)
	_, _ = fmt.Fprintf(&buf, "\tfoundRoot: %v,\n", dc.foundRoot)
	_, _ = buf.WriteString("\tcache: {\n")
	for k, v := range dc.cache {
		_, _ = fmt.Fprintf(&buf, "\t\t%q: %q,\n", k, v)
	}
	_, _ = buf.WriteString("\t},\n")
	_, _ = buf.WriteString("\tinvCache: {\n")
	for k, v := range dc.invCache {
		_, _ = fmt.Fprintf(&buf, "\t\t%q: %q,\n", k, v)
	}
	_, _ = buf.WriteString("\t},\n")
	_, _ = buf.WriteString("}\n")
	return buf.String()
}