public Map<String, Shape> getInitialMessageTargets() {
        return initialTargets;
    }
Gets the shapes targeted by the initial message members that are
not the target of an event stream.

<p>The returned map contains the same information as
{@link #getInitialMessageMembers} except each value is the shape
targeted by the member.

@return Returns the shapes targeted by the initial message members.

@see #getInitialMessageMembers
smithy-model/src/main/java/software/amazon/smithy/model/knowledge/EventStreamInfo.java