Function luks2_format 

pub fn luks2_format<'a>(
    cd: &mut RawDevice,
    cipher: &str,
    cipher_mode: &str,
    mk_bits: usize,
    data_alignment: usize,
    sector_size: u32,
    label: Option<&'a str>,
    subsystem: Option<&'a str>,
    data_device: Option<&Path>,
    maybe_uuid: Option<&Uuid>,
    pbkdf: Option<&'a Luks2FormatPbkdf<'_>>,
    integrity: Option<&'a Luks2FormatIntegrity<'_>>,
) -> Result<()>

Format a new crypt device as LUKS2 but do not activate it

Note this does not add an active keyslot