func InitLoggerWithDebug(d bool) *log.Logger {
	lvl := level.Warn  
	if d {
		lvl = level.Empty
	}
	return InitLoggerWithLevelAndWriter(lvl, os.Stderr)
}
InitLoggerWithDebug is util to init stderr logger with debug level or default
package ilog
import (
	"io"
	"os"
	"github.com/qingstor/log"
	"github.com/qingstor/log/level"
)