wp-includes/class-wp-icon-collections-registry.php:195Retrieves all registered icon collections.
array[] public function get_all_registered() { return array_values( $this->registered_collections ); }Introduced in 7.1.0.
Signature, return type and hooks compared across 1 parsed release.
src/wp-includes/class-wp-icon-collections-registry.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.