wp-includes/class-wp-admin-bar.php:230array|void final public function get_nodes() { $nodes = $this->_get_nodes(); if ( ! $nodes ) { return; } foreach ( $nodes as &$node ) { $node = clone $node; } return $nodes; }Introduced in 3.3.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
array|void to array|null.verified against sourcesrc/wp-includes/class-wp-admin-bar.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.