Welcome back! Today, we'll master what we learned about backward compatibility in practice. Get prepared to apply all the knowledge on practice tasks, but first, let's look at two examples and analyze them.

Let's say that initially, we have a complex data processing method designed to operate on an array of hashes, applying a transformation that converts all string values within the hashes to uppercase. Here's the initial version:

We intend to expand this method, adding capabilities to filter the items based on a condition and allow for custom transformations. The aim is to retain backward compatibility while introducing these enhancements. Here's the updated approach: