type hint for SomeType*2 is list[SomeType] but could be Iterable[SomeType]

We have

CoincidenceEvent: !record
  fields:
    # identifiers of the two detecting elements (see doc for DetectionBin)
    detectionBins: DetectionBin*2

This generates in types.py

class CoincidenceEvent:
    """All information about a coincidence event specified as indices (i.e. discretized)."""

    detection_bins: list[DetectionBin]

    def __init__(self, *,
        detection_bins: typing.Optional[list[DetectionBin]] = None,
        tof_idx: yardl.UInt32 = 0,
    ):
        self.detection_bins = detection_bins if detection_bins is not None else [DetectionBin() for _ in range(2)]

In my python code, I actually used a tuple as opposed to a list (I find that more intuitive for a list of 2 items), and everything works fine. However, pyright complains of course.

Start from the YAML definition for CoincidenceEvent and the generated types.py output shown in the issue. Trace where DetectionBin*2 is converted into the Python type annotation, then check the generator's existing tests for collection types. Done means the generated annotation accurately accepts the intended iterable values and the relevant generation tests pass.