[acf/get_valid_field/type=file]
WP_Hook Object
(
    [callbacks] => Array
        (
            [10] => Array
                (
                    [00000000229ce628000000005e13b135get_valid_field] => Array
                        (
                            [function] => Array
                                (
                                    [0] => acf_field_file Object
                                        (
                                            [name] => file
                                            [title] => 
                                            [category] => content
                                            [defaults] => Array
                                                (
                                                    [return_format] => array
                                                    [library] => all
                                                    [min_size] => 0
                                                    [max_size] => 0
                                                    [mime_types] => 
                                                )

                                            [l10n] => Array
                                                (
                                                    [select] => Select File
                                                    [edit] => Edit File
                                                    [update] => Update File
                                                    [uploadedTo] => Uploaded to this post
                                                )

                                            [label] => File
                                        )

                                    [1] => get_valid_field
                                )

                            [accepted_args] => 1
                        )

                )

            [20] => Array
                (
                    [00000000229ce514000000005e13b135get_valid_image_field] => Array
                        (
                            [function] => Array
                                (
                                    [0] => acf_compatibility Object
                                        (
                                        )

                                    [1] => get_valid_image_field
                                )

                            [accepted_args] => 1
                        )

                )

        )

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

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

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