The messageID of the original message that we're saving the update in history for.
The name of the event.
Optional
partial_The partial message response to be saved to the backend and used on session history reload to update the state of a previous message.
An event that is fired when a messageResponse is updated. This is triggered either by the end user updating messages in the pre:receive or customResponse events, or by us (internal) when we want to save state of a response type (ex. connect to agent).