Description: In the context of stream processing frameworks, ‘With Function’ refers to operations that use functions for stream data processing. These functions allow for transforming, filtering, and aggregating data in real-time, facilitating the analysis and manipulation of large volumes of information efficiently. Functions can be user-defined or predefined in the framework’s library, and they are applied to the elements of a data stream, enabling complex calculations and aggregation operations. The flexibility of functions in such frameworks is one of their most notable features, as it allows developers to customize data processing according to the specific needs of their applications. Additionally, the use of functions integrates seamlessly with the programming model, which is often based on functional programming principles, making it easier to create robust and scalable data processing applications. In summary, ‘With Function’ is a key concept that allows users to perform advanced operations on data streams, leveraging the power of functions to transform and analyze information in real-time.