wp-admin/includes/class-wp-ms-sites-list-table.php:217Displays a message when no sites are found.
public function no_items() { _e( 'No sites found.' ); }Introduced in 3.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-ms-sites-list-table.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.