],
];
+ $form['multi_file'] = [
+ '#type' => 'managed_file',
+ '#title' => t('Multiple file field with all file extensions'),
+ '#multiple' => TRUE,
+ '#default_value' => theme_get_setting('multi_file'),
+ '#upload_location' => 'public://test',
+ '#upload_validators' => [
+ 'file_validate_extensions' => [],
+ ],
+ ];
+
$form['#submit'][] = 'test_theme_settings_form_system_theme_settings_submit';
}