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Implement recursive string serialization for a hierarchical type system with primitives, generics, and nested tuples.
Format function signatures by joining parameter types and appending the return type using a specific arrow syntax.
Handle edge cases like empty parameter lists and arbitrarily deep nesting without extra spaces.
What This Tests
Recursive data structure traversal and serialization
Object-oriented state management and polymorphism
String manipulation and efficient concatenation
Handling nested/hierarchical structures
Common Patterns
DFS/BFS
Divide and Conquer
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