[jetpack_heartbeat]
WP_Hook Object
(
    [callbacks] => Array
        (
            [10] => Array
                (
                    [Automattic\Jetpack\Current_Plan::refresh_from_wpcom] => Array
                        (
                            [function] => Array
                                (
                                    [0] => Automattic\Jetpack\Current_Plan
                                    [1] => refresh_from_wpcom
                                )

                            [accepted_args] => 1
                        )

                    [0000000000002f390000000000000000get_plan_info_from_wpcom] => Array
                        (
                            [function] => Array
                                (
                                    [0] => Automattic\Jetpack\Search\Plan Object
                                        (
                                        )

                                    [1] => get_plan_info_from_wpcom
                                )

                            [accepted_args] => 1
                        )

                )

            [20] => Array
                (
                    [00000000000034dd0000000000000000sync_site_stats] => Array
                        (
                            [function] => Array
                                (
                                    [0] => Automattic\Jetpack\Sync\Modules\Stats Object
                                        (
                                        )

                                    [1] => sync_site_stats
                                )

                            [accepted_args] => 1
                        )

                )

        )

    [priorities:protected] => Array
        (
            [0] => 10
            [1] => 20
        )

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

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

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