def stamp.of
import bend-kit-sigv4@0.11.0.1/sigv4.bend as Sigv4import Base
import bend-kit-time@0.3.0.0/time.bend as Time
854def stamp.of(m: Maybe<&2, Time.DateTime>) -> String:
855 match m:
856 case None{}:
857 ""
858 case Some{Time.DateTime{Time.Date{y, mo, d}, h, mi, s, n}}:
859 String.concat([Time.pad(y, 4n), Time.pad(mo, 2n), Time.pad(d, 2n), "T", Time.pad(h, 2n), Time.pad(mi, 2n), Time.pad(s, 2n), "Z"])