code/manifest/manifest.php
final public function __isset($name)
    {
        $result = false;
        if($this->__manifest !== false) {
            $result = $this->__manifest->has($name);
        }

        return $result;
    }
final public function __isset($name)
    {
        $result = false;
        if($this->__manifest !== false) {
            $result = $this->__manifest->has($name);
        }

        return $result;
    }
final public function __isset ( $ name ) { $ result = false ; if ( $ this -> __manifest !== false ) { $ result = $ this -> __manifest -> has ( $ name ) ; } return $ result ; }
Test existence of a manifest option

@param string $name
@return bool
Test existence of a manifest option