why overriding???
- IN SOME SITUATIONS WE MIGHT REQUIRE A SPECIFIC IMPLEMENTATION OF A METHOD ONLY
- IN THE EX IF WE DOESNOT OVERRIDE METHOD LEADS TO THE IMPLEMENTATION OF RECTANGLE WITH SHARPEDEGESMETHOD
- BUT WE REQUIRE THE IMPLEMENTATION OF RECTAGLE WITH ROUNDEDGE ONLY
- HERE WE NEED THE SAME METHOD AND PARAMETERS OF PARENT(super)CLASS ONLY BUT IMPLEMENTION WILL BE ACCORDING TO OUR REQUIREMENTS
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