wp-includes/icons.php:24Registers a new icon collection.
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boolfunction wp_register_icon_collection( $slug, $args ) { return WP_Icon_Collections_Registry::get_instance()->register( $slug, $args );}Introduced in 7.1.0.
Signature, return type and hooks compared across 1 parsed release.
src/wp-includes/icons.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.