OptionalaltOptionalattachmentAn identifier used by Sunshine Conversations for internal purposes.
OptionalblockWhen set to true, the chat input will be disabled on supported client implementations when the message is the most recent one in the history. Can be used for guided flows or to temporarily disable the user's ability to send messages in the conversation.
OptionalhtmlOptionalmarkdownThe URL for media, such as an image, attached to the message.
OptionaltextThe text content of the message.
The type of message.
An optional description of the file for accessibility purposes. The field will be saved by default with the file name as the value.