WordPress at a glance
action is not described

dbx_post_sidebar action-hook . WP 2.1.0

Fires after all meta box sections have been output, before the closing #post-body div.

Usage

add_action( 'dbx_post_sidebar', 'action_function_name_7130' );
function action_function_name_7130( $post ){
	// action...
}
$post(WP_Post)
Post object.

Where the hook is called

In file: /wp-admin/edit-form-advanced.php
dbx_post_sidebar
wp-admin/edit-form-advanced.php 616
do_action( 'dbx_post_sidebar', $post );

Where the hook is used (in WP core)

Does not used.