DeferOptions

How @Defer acknowledges an interaction and locks a component's message.

Makes a command's deferred reply private.

Sends new messages without notifying: the first reply, when there was time to answer before deferring, and follow-ups.

Which controls of a component's message to disable while the handler runs: every one, the one clicked, or none, which also leaves out the loading view.

When to acknowledge: 'eager' at once, or 'auto' only if nothing answered after after milliseconds, so a fast handler answers with a single reply. 'auto' suits a handler that waits on I/O: a timer cannot fire while synchronous work blocks the event loop.

How long 'auto' waits before acknowledging, in milliseconds. It never waits past 2.5 seconds after the interaction was created.