OptionalcountNumber of messages to wait for.
OptionalexactIf true, require messages_count === count. If false (default), require messages_count >= count. When count is 0, always uses exact match regardless of this option.
OptionallimitLimit results
OptionalqueryOptional Search query. If omitted, polls all messages.
OptionalstartPagination offset
OptionaltzTimezone identifier used only for before: & after: searches (eg: "Pacific/Auckland").
Request parameters for the waitForMessages() API.