What most naturally follows?

How to use swipe gestures in google inbox
Swipe a message in your inbox to the right to mark it as " done ".
This will hide it from the inbox, but you can still easily find it later in the " done " section or in the message's label.
Swiping a message will mark the entire conversation as done.
This includes any replies to the original message as well. Swipe a bundle of messages to set them all " done " at once.