void addForwardReference(String id, Consumer<ShapeId> consumer) {
        addForwardReference(id, (resolved, found) -> {
            consumer.accept(resolved);
            return null;
        });
    }
Only allow nesting up to 64 arrays/objects in node values.
smithy-model/src/main/java/software/amazon/smithy/model/loader/IdlModelLoader.java