wp-includes/icons.php:84Registers the default icon collections.
function _wp_register_default_icon_collections() { wp_register_icon_collection( 'core', array( 'label' => __( 'WordPress' ), 'description' => __( 'Default icon collection.' ), ) );}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.