method Duration.prototype.toTimeStringimport { Duration } from "https://deno.land/x/durationjs@v4.1.0/mod.ts"; toTimeString(fromT?: keyof DurationObj, toT?: keyof DurationObj): stringGet a duration formatted using colons (:). ParametersoptionalfromT: keyof DurationObj = [UNSUPPORTED]Unit to display from. optionaltoT: keyof DurationObj = [UNSUPPORTED]Unit to display upto. ReturnsstringFormatted string.