@Override
    public final Map<String, MemberShape> getAllMembers() {
        Map<String, MemberShape> members = memberMap;
        if (members == null) {
            members = Collections.singletonMap("member", member);
            memberMap = members;
        }
        return members;
    }
Get the member shape of the collection.

@return Returns the member shape.
smithy-model/src/main/java/software/amazon/smithy/model/shapes/CollectionShape.java