extensions/gulp/src/main.ts/showError
function showError() {
	vscode.window.showWarningMessage(localize('gulpTaskDetectError', 'Problem finding gulp tasks. See the output for more information.'),
		localize('gulpShowOutput', 'Go to output')).then((choice) => {
			if (choice !== undefined) {
				_channel.show(true);
			}
		});
}