It was good to be able to learn about parts that I used to use without knowing the principles because I was in a hurry to produce while working in the field. And rather than uploading a framework like this lecture, I often thought about how to increase reusability and manage the system more efficiently by structuring it, as I was using code that worked at that time. This lecture was really helpful. And it was a great help in thinking a lot about the direction of coding to some extent.