@Override
        public Void intEnumShape(IntEnumShape shape) {
            new EnumShapeGenerator.IntEnumShapeGenerator().writeEnum(shape, symbolProvider, writer, model, false);
            writer.newLine();
            return null;
        }
Returns the base class to use for a trait.
smithy-trait-codegen/src/main/java/software/amazon/smithy/traitcodegen/generators/TraitGenerator.java