This example shows a functional programming workaround in Python, where the author demonstrates two versions of a `reduce` call that combine layers using the bitwise OR operator. The first version, a stylized ideal, uses keyword arguments `function` and `sequence` for clarity, but the second version omits them to satisfy the actual `functools.reduce` API. The code highlights the tension between expressive intent and the concrete signatures of Python’s standard library functions, using a lambda to map layer keys to values from a `LAYERS` dictionary. It is a minimal, self-contained snippet that contrasts desired syntax with required implementation.