WP_Customize_Nav_Menus::print_post_type_container

	public function available_items_template() {
		?>
		<div id="available-menu-items" class="accordion-container">
			<div class="customize-section-title">
				<button type="button" class="customize-section-back" tabindex="-1">
					<span class="screen-reader-text"><?php _e( 'Back' ); ?></span>
				</button>
				<h3>
					<span class="customize-action">
						<?php
							/* translators: &#9656; is the unicode right-pointing triangle. %s: Section title in the Customizer. */
							printf( __( 'Customizing &#9656; %s' ), esc_html( $this->manager->get_panel( 'nav_menus' )->title ) );
						?>
					</span>
					<?php _e( 'Add Menu Items' ); ?>
				</h3>
			</div>
			<div id="available-menu-items-search" class="accordion-section cannot-expand">
				<div class="accordion-section-title">
					<label class="screen-reader-text" for="menu-items-search"><?php _e( 'Search Menu Items' ); ?></label>
					<input type="text" id="menu-items-search" placeholder="<?php esc_attr_e( 'Search menu items&hellip;' ); ?>" aria-describedby="menu-items-search-desc" />
					<p class="screen-reader-text" id="menu-items-search-desc"><?php _e( 'The search results will be updated as you type.' ); ?></p>
					<span class="spinner"></span>
				</div>
				<div class="search-icon" aria-hidden="true"></div>
				<button type="button" class="clear-results"><span class="screen-reader-text"><?php _e( 'Clear Results' ); ?></span></button>
				<ul class="accordion-section-content available-menu-items-list" data-type="search"></ul>
			</div>
			<?php

			// Ensure the page post type comes first in the list.
			$item_types     = $this->available_item_types();
			$page_item_type = null;
			foreach ( $item_types as $i => $item_type ) {