$object = new Varien_Object(); $object->setId(123);In this example, we create a new `Varien_Object` instance and set its ID to `123`. `Varien_Object` is a class that is part of the Magento library/package. It provides a base object that can be extended to create custom Magento models, blocks, helpers, and more. The `setId()` method is used extensively throughout Magento to set the ID value for various objects, such as products, categories, and orders.