src/vs/workbench/contrib/welcome/gettingStarted/browser/gettingStartedService.ts/GettingStartedService/getStep
class GettingStartedService:	private getStep(id: string): IGettingStartedStep {
		const step = this.steps.get(id);
		if (!step) { throw Error('Attempting to access step which does not exist in registry ' + id); }
		return step;
	}