src/vs/workbench/services/views/browser/viewDescriptorService.ts/ViewDescriptorService/getOrCreateDefaultViewLocationContextKey
class ViewDescriptorService:	private getOrCreateDefaultViewLocationContextKey(viewDescriptor: IViewDescriptor): IContextKey<boolean> {
		const defaultViewLocationContextKeyId = `${viewDescriptor.id}.defaultViewLocation`;
		let contextKey = this.defaultViewLocationContextKeys.get(defaultViewLocationContextKeyId);
		if (!contextKey) {
			contextKey = new RawContextKey(defaultViewLocationContextKeyId, false).bindTo(this.contextKeyService);
			this.defaultViewLocationContextKeys.set(defaultViewLocationContextKeyId, contextKey);
		}
		return contextKey;
	}