src/vs/workbench/contrib/webview/browser/baseWebviewElement.ts/BaseWebview/doUpdateContent
class BaseWebview:	private doUpdateContent(newContent: WebviewContent) {
		this._logService.debug(`Webview(${this.id}): will update content`);

		this.content = newContent;

		this._send('content', {
			contents: this.content.html,
			options: this.content.options,
			state: this.content.state,
			cspSource: webviewGenericCspSource,
			...this.extraContentOptions
		});
	}