src/vs/workbench/contrib/searchEditor/browser/searchEditor.ts/SearchEditor/addMessage
class SearchEditor:	private addMessage(message: TextSearchCompleteMessage) {
		let messageBox: HTMLElement;
		if (this.messageBox.firstChild) {
			messageBox = this.messageBox.firstChild as HTMLElement;
		} else {
			messageBox = DOM.append(this.messageBox, DOM.$('.message'));
		}

		DOM.append(messageBox, renderSearchMessage(message, this.instantiationService, this.notificationService, this.openerService, this.commandService, this.messageDisposables, () => this.triggerSearch()));
	}