protected function setVar(common\_var $var)
{
if (!$var->getInstance() instanceof instance\_Array) {
$this->getWindow()->throwException('Can call key only on array');
}
$this->var = $var;
}
protected function buildVariable(common\_var $var)
{
$isset = $this->callFunction('isset', $this->tokenToInstance('php-boolean'), array($var));
$new = $this->createInstanciate($var->getInstance());
$this->add($this->createCondition($this->createNot($isset), $this->createAssign($var, $new)));
}