Subclass of ConnectApi.MessageSegment.
| Property Name | Type | Description | Available Version |
|---|---|---|---|
| altText | String | Alt text for the inline image. | 35.0 |
| contentSize | Integer | Size of the file in bytes. | 35.0 |
| fileExtension | String | Extension of the file, such as gif. | 37.0 |
| thumbnails | ConnectApi.File​PreviewCollection | Information about the available thumbnails for the image. | 35.0 |
| url | String | URL to the latest version of the inline image. | 35.0 |