References an image File in the content of a message.
| Name | Type | Description | Notes |
|---|---|---|---|
| index | Integer | The index of the content part in the message. | |
| type | TypeEnum | Always `image_file`. | |
| imageFile | MessageDeltaContentImageFileObjectImageFile | [optional] |
| Name | Value |
|---|---|
| IMAGE_FILE | "image_file" |