Regular lookahead sets are a type of set where each element is a set itself. They're like a box within a box, a Matryoshka doll of sets.
Nested Sets can get pretty complicated, but don't worry, we'll break it down.
Here's an example of a regular lookahead set: { {1, 2, 3}, {4, 5, 6} }
See how it's a set of sets? Set of Sets is the new black.
A set of sets is a type of regular lookahead set where all elements are themselves regular lookahead sets.
This is getting deep, isn't it? Nested Sets Are Just a Start.
A lookahead set of sets is a set of sets that are themselves lookahead sets.
Don't worry, it's not as confusing as it sounds. Set of Sets is Just a Set.
Now we're getting really deep. Lookahead Set of Sets of Sets is like the never-ending staircase of sets.
Don't try this at home, folks. Set of Sets of Sets of Sets may cause dizziness, confusion, and existential dread.