interface FillOptionimport { type FillOption } from "https://dotland.deno.dev/std@0.36.0/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