Extension example

<?php

class HomePage extends Page {

	private static $extensions = array(
		"GalleryExtension",
	);

}


class GalleryPage extends Page {

	private static $extensions = array(
		"GalleryExtension",
	);

}


class GalleryExtension extends DataExtension {

	private static $has_many = array(
		"GalleryImages" => "Image",
	);

}