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

Let's say that initially, we have a complex data processing class designed to operate on a list of Dictionary<string, object>, applying a transformation that converts all string values within the Dictionary to uppercase. Here's the initial version:

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