# 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. | |