text: package concurrent
  
  import (
  	"os"
  	"log"
  	"io/ioutil"
  )
  
  // ErrorLogger is used to print out error, can be set to writer other than stderr
  var ErrorLogger = log.New(os.Stderr, "", 0)
  
  // InfoLogger is used to print informational message, default to off
  var InfoLogger = log.New(ioutil.Discard, "", 0)