func SetFormatter(f Formatter) {
	formatter.Lock()
	defer formatter.Unlock()
	formatter.def = f
}
func SetFormatter(f Formatter) {
	formatter.Lock()
	defer formatter.Unlock()
	formatter.def = f
}
func SetFormatter ( f Formatter ) { formatter . Lock ( ) defer formatter . Unlock ( ) formatter . def = f }
// SetFormatter sets the default formatter for all new backends. A backend will
// fetch this value once it is needed to format a record. Note that backends
// will cache the formatter after the first point. For now, make sure to set
// the formatter before logging.
SetFormatter sets the default formatter for all new backends . A backend will fetch this value once it is needed to format a record . Note that backends will cache the formatter after the first point . For now make sure to set the formatter before logging .