public function get($id)
    {
        $resolved = $this->getResolved($id);

        return $resolved ? $resolved->getInnerExtension() : null;
    }
public function get($id)
    {
        $resolved = $this->getResolved($id);

        return $resolved ? $resolved->getInnerExtension() : null;
    }
public function get ( $ id ) { $ resolved = $ this -> getResolved ( $ id ) ; return $ resolved ? $ resolved -> getInnerExtension ( ) : null ; }
Get an installed extension class.

@param string|null $id The extension ID or composer name

@return ExtensionInterface|null
Get an installed extension class .