A file, image, or video attachment sent with a `KUSChatMessage
`. Belongs to a single `KUSConversation
` and `KUSChatMessage
`.
### id
### conversationId
### fileExtension
### url
URL used to download the attached file
### name
File name of attachment
### chatMessageId
Chat message ID of parent message.
Do not rely on there being a `KUSChatMessage
` with this ID. Ok to rely on this being valid on the server side after the attachment has finished uploading and sending.
## CustomStringConvertible
### description