Before Parsed Post Arguments
Array
(
    [post_type] => event
    [meta_queries] => _event_all_day
    [_event_all_day_value] => 1
    [_event_all_day_compare] => >=
)

Parsed Post Arguments
Array
(
    [post_type] => event
    [meta_queries] => _event_all_day
    [_event_all_day_value] => 1
    [_event_all_day_compare] => >=
    [posts_per_page] => 10
    [order] => DESC
    [orderby] => 
    [ignore_sticky_posts] => 1
)

Final Post Arguments
Array
(
    [post_type] => event
    [posts_per_page] => 10
    [order] => DESC
    [orderby] => 
    [ignore_sticky_posts] => 1
    [meta_query] => Array
        (
            [0] => Array
                (
                    [0] => Array
                        (
                            [key] => _thumbnail_id
                            [compare] => EXISTS
                        )

                )

            [1] => Array
                (
                    [key] => _event_all_day
                    [compare] => >=
                    [value] => 1
                )

        )

    [before] => 
    [after] => 
    [today] => 
    [inclusive] => 
)