func Get() *Glg {
	once.Do(func() {
		fastime.SetFormat(timeFormat)
		glg = New()
	})
	return glg
}
func Get() *Glg {
	once.Do(func() {
		fastime.SetFormat(timeFormat)
		glg = New()
	})
	return glg
}
func Get ( ) * Glg { once . Do ( func ( ) { fastime . SetFormat ( timeFormat ) glg = New ( ) } ) return glg }
// Get returns singleton glg instance
Get returns singleton glg instance