WordPress at a glance
function is not described

WP_Media_List_Table::get_sortable_columns() WP 1.0

This is a method of the class: WP_Media_List_Table

No Hooks.

Return

Array.

Usage

$WP_Media_List_Table = new WP_Media_List_Table();
$var = $WP_Media_List_Table->get_sortable_columns();

Code of WP Media List Table::get sortable columns: wp-admin/includes/class-wp-media-list-table.php WP 5.2.2

<?php
protected function get_sortable_columns() {
	return array(
		'title'    => 'title',
		'author'   => 'author',
		'parent'   => 'parent',
		'comments' => 'comment_count',
		'date'     => array( 'date', true ),
	);
}