public Object transform(InputModel inputModel) {
	ExecutionContextImpl context = new ExecutionContextImpl(new TypeSystemImpl());;
	EmfMetaModel metamodel = new EmfMetaModel();
	metamodel.setMetaModelPackage(MyMetaModelPackage.class.getName());
	context.registerMetaModel(metamodel);

	String extensionFile = "myExtension.ext";
	XtendFacade xtendFacade = XtendFacade.create(context, extensionFile);

	Object targetModel = xtendFacade.call("transform", inputModel);
	return targetModel;
}