wp-admin/includes/class-wp-screen.php:726Gets the accessible hidden headings and text used in the screen.
string[] public function get_screen_reader_content() { return $this->_screen_reader_content; }Introduced in 4.4.0. 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-screen.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.