handlers.go
func (handler *NullHandler) HandleError(err error) error {
	os.Stderr.WriteString(fmt.Sprintf("%s %s\n", time.Now(), err.Error()))
	return nil
}
func (handler *NullHandler) HandleError(err error) error {
	os.Stderr.WriteString(fmt.Sprintf("%s %s\n", time.Now(), err.Error()))
	return nil
}
func ( handler * NullHandler ) HandleError ( err error ) error { os . Stderr . WriteString ( fmt . Sprintf ( " \n " , time . Now ( ) , err . Error ( ) ) ) return nil }
// HandleError prints provided error to stderr.
HandleError prints provided error to stderr .