method OutgoingMessage.prototype.hasHeader Usage in Deno```typescript import { OutgoingMessage } from "node:node__http.d.ts"; ``` OutgoingMessage.prototype.hasHeader(name: string): boolean Returns `true` if the header identified by `name` is currently set in the outgoing headers. The header name is case-insensitive. ```js const hasContentType = outgoingMessage.hasHeader('content-type'); ``` Parameters name: string Return Type boolean