kernel/private/rest/classes/cache/options/storage_cluster.php
public function __isset( $key )
    {
        // Delegate
        return ( array_key_exists( $key, $this->properties ) || isset( $this->storageOptions->$key ) );
    }
public function __isset( $key )
    {
        // Delegate
        return ( array_key_exists( $key, $this->properties ) || isset( $this->storageOptions->$key ) );
    }
public function __isset ( $ key ) { // Delegate return ( array_key_exists ( $ key , $ this -> properties ) || isset ( $ this -> storageOptions -> $ key ) ) ; }
Returns if a option exists.

@param string $key Option name to check for.
@return void
@ignore
Returns if a option exists .