src/transformers/utils/fx.py/HFAttribute/__init__
class HFAttribute:    def __init__(self, root, attr: str):
        self.root = root
        self.attr = attr
        self.tracer = root.tracer
        self._node = None

        if hasattr(self.root, "_metadata"):
            self.install_metadata(getattr(self.root._metadata, attr))