def fiftyone_requirement(self):
        """The FiftyOne requirement as a string like ``fiftyone>=0.21``."""
        req_str = self.fiftyone_compatibility or ""
        req_str = req_str.strip()

        if not req_str or req_str == "*":
            return None

        if not req_str.startswith("fiftyone"):
            req_str = "fiftyone" + req_str

        return req_str
The FiftyOne requirement as a string like ``fiftyone>=0.21``.
fiftyone/plugins/definitions.py