public function __construct($name, $visiblity, $static, Operand $defaultVar = null, Block $defaultBlock = null, array $attributes = [])
{
parent::__construct($attributes);
$this->name = $this->addReadRef($name);
$this->visiblity = $visiblity;
$this->static = $static;
$this->defaultVar = $this->addReadRef($defaultVar);
$this->defaultBlock = $defaultBlock;
}