src/vs/editor/contrib/peekView/peekView.ts/PeekViewWidget/_fillHead
class PeekViewWidget:	protected _fillHead(container: HTMLElement, noCloseAction?: boolean): void {
		const titleElement = dom.$('.peekview-title');
		dom.append(this._headElement!, titleElement);
		dom.addStandardDisposableListener(titleElement, 'click', event => this._onTitleClick(event));

		this._fillTitleIcon(titleElement);
		this._primaryHeading = dom.$('span.filename');
		this._secondaryHeading = dom.$('span.dirname');
		this._metaHeading = dom.$('span.meta');
		dom.append(titleElement, this._primaryHeading, this._secondaryHeading, this._metaHeading);

		const actionsContainer = dom.$('.peekview-actions');
		dom.append(this._headElement!, actionsContainer);

		const actionBarOptions = this._getActionBarOptions();
		this._actionbarWidget = new ActionBar(actionsContainer, actionBarOptions);
		this._disposables.add(this._actionbarWidget);

		if (!noCloseAction) {
			this._actionbarWidget.push(new Action('peekview.close', nls.localize('label.close', "Close"), Codicon.close.classNames, true, () => {
				this.dispose();
				return Promise.resolve();
			}), { label: false, icon: true });
		}
	}