/**
 * Retrieve restaurants.
 */
public function get_items( $request ) {
    $args = array(
        'post_type'      => $this->post_type,
        'posts_per_page' => $request['per_page'],
        'page'           => $request['page'],
    );

    $restaurants = get_posts( $args );
    $data = array();

    if ( $restaurants ) {
        foreach ( $restaurants as $restaurant ) :
            $itemdata = $this->prepare_item_for_response( $restaurant, $request );
            $data[] = $this->prepare_response_for_collection( $itemdata );
        endforeach;
    }

    $data = rest_ensure_response( $data );
    return $data;
}