def complex_func(a: int, b: int) -> float:
        """
        A complex test function.

        Args:
          a: an int
          b: an int

        Returns:
          int: The product of a and b plus 10.
        """
        import math

        def _inner(x: int) -> int:
            return x + 5

        def _helper(y: int) -> int:
            def _nested(z: int) -> int:
                return z * 2

            return _nested(y) + _inner(y)

        return _helper(a) + math.sqrt(b)

        A complex test function.

        Args:
          a: an int
          b: an int

        Returns:
          int: The product of a and b plus 10.
        
ai/core/tests/core/oss/test_oss_client.py