/**
* Get value (will call getter )
* @param string $key
* @param mixed $defaultValue
* @return mixed
* @throws \InvalidArgumentException
*/
public function get($key, $defaultValue = null)
{
$key = $this->_getKey($key);
if (!is_string($key)) {
throw new \InvalidArgumentException("key must be a string");
}
if (!$key) {
return null;
}
return parent::get($key, $defaultValue);
}
