The issue with this and `singledispatch` is that they no longer support pseudo-types from the `typing` module [1] so you can't use them with containers of type

The issue with this and `singledispatch` is that they no longer support pseudo-types from the `typing` module [1] so you can't use them with containers of type `x`, e.g. `List[str]`, or protocols like `Sequence`. [1] https://bugs.python.org/issue34498 https://bugs.python.org/issue34498