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## Summary Refer: https://github.com/astral-sh/ruff/issues/13773#issuecomment-2548020368 This PR adds support for unpacking union types. Unpacking a union type requires us to first distribute the types for all the targets that are involved in an unpacking. For example, if there are two targets and a union type that needs to be unpacked, each target will get a type from each element in the union type. For example, if the type is `tuple[int, int] | tuple[int, str]` and the target has two elements `(a, b)`, then * The type of `a` will be a union of `int` and `int` which are at index 0 in the first and second tuple respectively which resolves to an `int`. * Similarly, the type of `b` will be a union of `int` and `str` which are at index 1 in the first and second tuple respectively which will be `int | str`. ### Refactors There are couple of refactors that are added in this PR: * Add a `debug_assertion` to validate that the unpack target is a list or a tuple * Add a separate method to handle starred expression ## Test Plan Update `unpacking.md` with additional test cases that uses union types. This is done using parameter type hints style.