src/vs/workbench/contrib/welcome/walkThrough/browser/walkThroughPart.ts/WalkThroughPart/open
class WalkThroughPart:	private open(uri: URI) {
		if (uri.scheme === 'command' && uri.path === 'git.clone' && !CommandsRegistry.getCommand('git.clone')) {
			this.notificationService.info(localize('walkThrough.gitNotFound', "It looks like Git is not installed on your system."));
			return;
		}
		this.openerService.open(this.addFrom(uri), { allowCommands: true });
	}