public Shape getEventStreamTarget() {
        return eventStreamTarget;
    }
Gets the shape that is streamed over the event stream.

<p>If the target shape is a structure, then the event stream
is a single-event event stream that streams events of a single
shape. If the target shape is a union, then the event stream is
a multi-event event stream that streams one or more named events
of various structure shapes.

@return Returns a structure or union shape.
smithy-model/src/main/java/software/amazon/smithy/model/knowledge/EventStreamInfo.java