fn write_timestamp(
f: &mut dyn Write,
naive: NaiveDateTime,
timezone: Option<Tz>,
format: &CompiledTimeFormat<'_>,
) -> FormatResultfn write_timestamp(
f: &mut dyn Write,
naive: NaiveDateTime,
timezone: Option<Tz>,
format: &CompiledTimeFormat<'_>,
) -> FormatResult