# Dropbox::Sign::SubFormFieldRuleAction
## Properties
| Name | Type | Description | Notes |
| ---- | ---- | ----------- | ----- |
| `hidden`*_required_ | ```Boolean``` | `true` to hide the target field when rule is satisfied, otherwise `false`. | |
| `type`*_required_ | ```String``` | | |
| `field_id` | ```String``` | **field_id** or **group_id** is required, but not both.
Must reference the `api_id` of an existing field defined within `form_fields_per_document`.
Cannot use with `group_id`. Trigger and action fields must belong to the same signer. | |
| `group_id` | ```String``` | **group_id** or **field_id** is required, but not both.
Must reference the ID of an existing group defined within `form_field_groups`.
Cannot use with `field_id`. Trigger and action fields and groups must belong to the same signer. | |