Respect\Validation\Exceptions\ValidationException::format PHP Method

    public static function format($template, array $vars = [])
    {
        return preg_replace_callback('/{{(\\w+)}}/', function ($match) use($vars) {
            if (!isset($vars[$match[1]])) {
                return $match[0];
            }
            $value = $vars[$match[1]];
            if ('name' == $match[1]) {
                return $value;
            }
            return ValidationException::stringify($value);
        }, $template);
    }

 /**
  * @dataProvider providerForFormat
  */
 public function testFormatShouldReplacePlaceholdersProperly($template, $result, $vars)
 {
     $this->assertEquals($result, ValidationException::format($template, $vars));
 }