func (l *Logger) String() string {
	l.mu.RLock()
	defer l.mu.RUnlock()
	return l.buf.String()
}
// String returns the recorded string.
String returns the recorded string.
// String returns the recorded string .
func (l *Logger) String() string {
	l.mu.RLock()
	defer l.mu.RUnlock()
	return l.buf.String()
}
func ( l * Logger ) String ( ) string { l . mu . RLock ( ) defer l . mu . RUnlock ( ) return l . buf . String ( ) }
String returns the recorded string.
String returns the recorded string .