interface FillOptionimport { type FillOption } from "https://deno.land/x/deno@v0.28.0/std/strings/mod.ts"; FillOption Object Propertiesoptionalchar: stringChar to fill in optionalside: "left" | "right"Side to fill in optionalstrict: booleanIf strict, output string can't be greater than strLen optionalstrictChar: stringchar/string used to specify the string has been truncated optionalstrictSide: "left" | "right"Side of truncate