src/vs/workbench/api/common/extHostWebview.ts/ExtHostWebview/html
class ExtHostWebview:	public set html(value: string) {
		this.assertNotDisposed();
		if (this.#html !== value) {
			this.#html = value;
			if (!this.#hasCalledAsWebviewUri && /(["'])vscode-resource:([^\s'"]+?)(["'])/i.test(value)) {
				this.#hasCalledAsWebviewUri = true;
				this.#deprecationService.report('Webview vscode-resource: uris', this.#extension,
					`Please migrate to use the 'webview.asWebviewUri' api instead: https://aka.ms/vscode-webview-use-aswebviewuri`);
			}
			this.#proxy.$setHtml(this.#handle, value);
		}
	}