public static function err($message, $endLine = PHP_EOL)
    {
        if (! Argument::getInstance()->has('quiet')) {
            fwrite(STDERR, $message . $endLine);
        }
    }
public static function err($message, $endLine = PHP_EOL)
    {
        if (! Argument::getInstance()->has('quiet')) {
            fwrite(STDERR, $message . $endLine);
        }
    }
public static function err ( $ message , $ endLine = PHP_EOL ) { if ( ! Argument :: getInstance ( ) -> has ( 'quiet' ) ) { fwrite ( STDERR , $ message . $ endLine ) ; } }
Display message on error output

@param string $message
@param string $endLine
@return void
Display message on error output