Great work !! I have one doubt though

[viralmutant]

Hi
This is more of a question than any issue.
Gr8 work, by the way, having the UML diagrams and class definitions etc. really helps.

I haven't bought the Educative course and was wondering if the class definitions have been borrowed from there or defined on our own ? I was going through the Parking Lot design and it seems some class definitions are missing and others had a few minor bugs.
So was wondering, when you say this is an extended version of the course, what exactly does that mean ?