Function aivdm_message_repeat_indicator 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn aivdm_message_repeat_indicator(
    msg: *const AivdmMessage,
) -> u8

How many times a repeater has relayed this message (0-3).

Safety

msg must be NULL or a valid, non-freed handle from aivdm_decode_line.