Function fmt_iso_year_century_extended_range 

fn fmt_iso_year_century_extended_range(
    output: &mut (impl Write + ?Sized),
    century: ri16<-9_999, 9_999>,
    is_negative: bool,
    _: IsoYearCenturyExtendedRange,
) -> Result<usize>

Available on crate feature formatting only.