Function arrow2::temporal_conversions::utf8_to_timestamp_ns_scalar

pub fn utf8_to_timestamp_ns_scalar<T: TimeZone>(
    value: &str, 
    fmt: &str, 
    tz: &T
) -> Option<i64>

Parses value to Option<i64> consistent with the Arrow’s definition of timestamp with timezone. tz must be built from timezone (either via parse_offset or chrono-tz).