Currently, if a signal/slot uses QVariant as an argument or return value, then we need to specify the QVariant type as a string. For example:

@Slot(result='QVariant')

However, this leads to a mypy error (see attached project):

main.py:22: error: Argument "result" to "Slot" has incompatible type "str"; expected "type | None"  [arg-type]