@Override
        protected Void getDefault(Shape shape) {
            serializeTraits(shape);
            codeWriter.writeInline("$L $L ", shape.getType(), shape.getId().getName());
            writeMixins(shape);
            codeWriter.write("").write("");
            return null;
        }
Serializes shapes in the IDL format.
smithy-model/src/main/java/software/amazon/smithy/model/shapes/SmithyIdlModelSerializer.java