$pages->add()
Adds a single page or an entire second collection to the current collection
$pages->add(Kirby\Cms\Pages|Kirby\Cms\Page|string $object): Kirby\Cms\Pages 
Parameters
| Name | Type | Default | 
|---|---|---|
| $objectrequired | Kirby\Cms\Pages<TPage>orKirby\Cms\Pageorstring | 
				no default value | 
Return type
This method modifies the existing $pages object it is applied to and returns it again.
Exceptions
| Type | Description | 
|---|---|
Kirby\Exception\InvalidArgumentException | 
				When no Page or Pages object or an ID of an existing page is passed | 
			
Parent class
Examples
Add single page by ID
$collection = page('exhibitions')->children()->listed();
$collection->add('somepage');
Add single page by $page object
$collection = page('exhibitions')->children()->listed();
$page       = Page::create([…]);
$collection->add($page);
Add second pages collection
$collection = page('exhibitions')->children()->listed();
$collection->add(page('news')->children()->listed());