def outer_func(x: int, y: int) -> str:
        """
        A function that demonstrates nested functions.

        Args:
            x: The x parameter
            y: The y parameter

        Returns:
            str: A string representation of the sum of x and y
        """

        def inner_func(a: int) -> int:
            return a + y

        return str(inner_func(x))

        A function that demonstrates nested functions.

        Args:
            x: The x parameter
            y: The y parameter

        Returns:
            str: A string representation of the sum of x and y
        
ai/core/tests/core/test_callable_utils.py