wp-includes/class-wp-admin-bar.php:492$nodeobject final protected function _render_container( $node ) { if ( 'container' !== $node->type || empty( $node->children ) ) { return; } echo '<div id="' . esc_attr( 'wp-admin-bar-' . $node->id ) . '" class="ab-group-container">'; foreach ( $node->children as $group ) { $this->_render_group( $group ); } echo '</div>'; }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-includes/class-wp-admin-bar.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.