Initializer initializer = ast.newInitializer();
Block body = ast.newBlock();
initializer.setBody(body);
MethodInvocation addInvocation = ast.newMethodInvocation();
addInvocation.setExpression(ast.newSimpleName(CHECKPOINT_NAME));
addInvocation.setName(ast.newSimpleName("addObject"));
ClassInstanceCreation proxy = ast.newClassInstanceCreation();
proxy
.setType(ast.newSimpleType(ast