| Name | Type | Description | Notes |
|---|---|---|---|
| field_name | string | The display name/label of the field | |
| field_code | string | The unique identifier for the field (40-character hash for custom fields) | |
| field_type | string | The type of the field | |
| options | \Pipedrive\versions\v2\Model\ActivityFieldItemOptions[] | Array of available options for enum/set fields, null for other field types | [optional] |
| subfields | \Pipedrive\versions\v2\Model\ActivityFieldItemSubfields[] | Array of subfields for complex field types (address, monetary), null for simple field types | [optional] |
| is_custom_field | bool | Whether this is a user-created custom field | |
| is_optional_response_field | bool | Whether this field is not returned by default in entity responses | |
| ui_visibility | \Pipedrive\versions\v2\Model\ActivityFieldItemUiVisibility | [optional] |