def METHOD_NAME(session_template: BosSessionTemplate) -> List[str]:
    """
    Returns list of the v2-specific fields in the session template. List is empty if none found.
    Per the BOS API spec (https://github.com/Cray-HPE/bos/blob/develop/api/openapi.yaml.in),
    the only v2-specified field is:
    boot_sets[].cfs
    """
    fields_found = []
    if "boot_sets" in session_template:
        if any("cfs" in bootset for bootset in session_template["boot_sets"].values()):
            fields_found.append("boot_sets[].cfs")
    return fields_found