Function parse_uki_cmdline 

fn parse_uki_cmdline<R: Read + Seek>(
    pe_type: &PEType,
    missing_fsverity_allowed: bool,
    boot_ids: &ExpectedBootImageIds,
    uki_reader: &mut R,
    uki_name: &str,
    uki_info: &mut UKIInfo,
) -> Result<()>

Makes sure there is no composefs= cmdline in a global UKI Addon Makes sure if we already have a parsed cmdline, we don’t find another one