public function addExtensions(Extension ...$extensions): void
    {
        foreach ($extensions as $extension)
        {
            $this->extensions->attach($extension);
        }
    }
public function addExtensions(Extension ...$extensions): void
    {
        foreach ($extensions as $extension)
        {
            $this->extensions->attach($extension);
        }
    }
public function addExtensions ( Extension ... $ extensions ) : void { foreach ( $ extensions as $ extension ) { $ this -> extensions -> attach ( $ extension ) ; } }
Add customer extension.

@noinspection PhpDocSignatureInspection

@param Extension ...$extensions

@return void
Add customer extension .