template-functions-get-list-screens.php

<?php

/**
 * Fetch all list screens for a particular list table.
 */
function acp_loaded() {

	/**
	 * The "List Screen Key" can be found by opening the screen options in the top-right corner of the
	 * admin columns settings page. Enable the "List screen Key" by clicking the checkbox next to it.
	 * The list screen Key will now be visible in the right sidebar.
	 * @var string $list_screen_key
	 */
	$list_screen_key = "<LIST SCREEN KEY GOES HERE>"; // e.g. page

	/**
	 * @var AC\ListScreen[] $list_screens
	 */
	$list_screens = ac_get_list_screens( $list_screen_key );
}

add_action( 'wp_loaded', 'acp_loaded' );