wp-admin/includes/class-wp-screen.php:490Sets the parent information for the screen.
$parent_filestring public function set_parentage( $parent_file ) { $this->parent_file = $parent_file; list( $this->parent_base ) = explode( '?', $parent_file ); $this->parent_base = str_replace( '.php', '', $this->parent_base ); }Introduced in 3.3.0. 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.