WordPress at a glance
action is not described

metadata_lazyloader_queued_objects action-hook . WP 4.5.0

Fires after objects are added to the metadata lazy-load queue.

Usage

add_action( 'metadata_lazyloader_queued_objects', 'action_function_name_3058', 10, 3 );
function action_function_name_3058( $object_ids, $object_type, $lazyloader ){
	// action...
}
$object_ids(array)
Object IDs.
$object_type(string)
Type of object being queued.
$lazyloader(WP_Metadata_Lazyloader)
The lazy-loader object.

Where the hook is called

WP_Metadata_Lazyloader::queue_objects()
wp-includes/class-wp-metadata-lazyloader.php 104
do_action( 'metadata_lazyloader_queued_objects', $object_ids, $object_type, $this );

Where the hook is used (in WP core)

Does not used.