setter.go
func (f *FileLogger) SetMaxFileSize(size int64, unit UNIT) int64 {
	f.fileSize = size * int64(unit)
	return f.fileSize
}
func (f *FileLogger) SetMaxFileSize(size int64, unit UNIT) int64 {
	f.fileSize = size * int64(unit)
	return f.fileSize
}
func ( f * FileLogger ) SetMaxFileSize ( size int64 , unit UNIT ) int64 { f . fileSize = size * int64 ( unit ) return f . fileSize }
// Change the sizeSplit fileLogger's single file size
Change the sizeSplit fileLogger s single file size