interface HTMLCollectionMutatorimport { type HTMLCollectionMutator } from "https://dotland.deno.dev/x/deno_dom@v0.1.42/src/dom/html-collection.ts"; Methodspush(...elements: Element[]): numbersplice(start: number,deleteCount?: number,...items: Element[],): Element[]indexOf(element: Element, fromIndex?: number | undefined): number