@Override
    public void postprocess(IntermediateModel intermediateModel) {
        // do nothing
    }
Rename shapes for Member, Input, Output, ErrorMap, as well as the key for two maps:
serviceModel.shape() and shapeModifiers
aws-java-sdk-code-generator/src/main/java/com/amazonaws/codegen/customization/processors/RenameShapesProcessor.java