WordPress at a glance
function is not described

_admin_bar_bump_cb() WP 3.1.0

Default admin bar callback.

No Hooks.

Return

Nothing (null).

Usage

_admin_bar_bump_cb();

Code of admin bar bump cb: wp-includes/admin-bar.php VER 5.1.1

<?php
function _admin_bar_bump_cb() {

	?>
<style type="text/css" media="screen">
	html { margin-top: 32px !important; }
	* html body { margin-top: 32px !important; }
	@media screen and ( max-width: 782px ) {
		html { margin-top: 46px !important; }
		* html body { margin-top: 46px !important; }
	}
</style>
	<?php
}