public static EventStreamIndex of(Model model) {
        return model.getKnowledge(EventStreamIndex.class, EventStreamIndex::new);
    }
Index of operation shapes to event stream information.

<p>This knowledge index provides information about event streams in
operations, including the input/output member that contains an
event stream, the shape targeted by this member, and any additional
input/output members that form the initial message.
smithy-model/src/main/java/software/amazon/smithy/model/knowledge/EventStreamIndex.java