def METHOD_NAME(vfp_data: dict[str, dict[str, list[str]]]) -> dict[str, set[str]]:
    """
    Look for files with the same "virtual file path".
    input: {uid {parent_uid: [vfp]}} -> output: {vfp: [uid]}
    """
    result = {}
    for uid in vfp_data:
        vfp_dict = vfp_data.get(uid)
        for vfp_list in vfp_dict.values():
            for vfp in vfp_list:
                result.setdefault(vfp, set()).add(uid)
    return result