wp-admin/includes/class-wp-plugins-list-table.php:72Gets the CSS classes for the list table element.
string[] protected function get_table_classes() { return array( 'widefat', $this->_args['plural'] ); }Introduced in 3.1.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
array to string[].verified against sourcesrc/wp-admin/includes/class-wp-plugins-list-table.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.