function gfmHeadingIdimport { gfmHeadingId } from "https://deno.land/x/gfm@0.2.5/deps.ts"; gfmHeadingId(options?: GfmHeadingIdOptions): marked.MarkedExtensionAdd id attribute to headings (h1, h2, h3, etc) like GitHub. Add id attribute to headings (h1, h2, h3, etc) like GitHub. Parametersoptionaloptions: GfmHeadingIdOptionsOptions for the extension Returnsmarked.MarkedExtensionA marked.MarkedExtension | MarkedExtension to be passed to marked.use | marked.use()