[activate_insert-headers-and-footers/ihaf.php]
WP_Hook Object
(
    [callbacks] => Array
        (
            [10] => Array
                (
                    [000000000000027c0000000000000000activate] => Array
                        (
                            [function] => Array
                                (
                                    [0] => WPCode_Install Object
                                        (
                                        )

                                    [1] => activate
                                )

                            [accepted_args] => 1
                        )

                )

        )

    [priorities:protected] => Array
        (
            [0] => 10
        )

    [iterations:WP_Hook:private] => Array
        (
        )

    [current_priority:WP_Hook:private] => Array
        (
        )

    [nesting_level:WP_Hook:private] => 0
    [doing_action:WP_Hook:private] => 
)