[acf/update_value/type=flexible_content]
WP_Hook Object
(
    [callbacks] => Array
        (
            [10] => Array
                (
                    [00000000582da7ab0000000077900390update_value] => Array
                        (
                            [function] => Array
                                (
                                    [0] => acf_field_flexible_content Object
                                        (
                                            [name] => flexible_content
                                            [title] => 
                                            [category] => layout
                                            [defaults] => Array
                                                (
                                                    [layouts] => Array
                                                        (
                                                        )

                                                    [min] => 
                                                    [max] => 
                                                    [button_label] => Add Row
                                                )

                                            [l10n] => Array
                                                (
                                                    [layout] => layout
                                                    [layouts] => layouts
                                                    [remove] => remove {layout}?
                                                    [min] => This field requires at least {min} {identifier}
                                                    [max] => This field has a limit of {max} {identifier}
                                                    [min_layout] => This field requires at least {min} {label} {identifier}
                                                    [max_layout] => Maximum {label} limit reached ({max} {identifier})
                                                    [available] => {available} {label} {identifier} available (max {max})
                                                    [required] => {required} {label} {identifier} required (min {min})
                                                )

                                            [label] => Flexible Content
                                        )

                                    [1] => update_value
                                )

                            [accepted_args] => 3
                        )

                )

        )

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

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

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