src/vs/workbench/contrib/welcome/walkThrough/browser/walkThroughPart.ts/WalkThroughPart/createEditor
class WalkThroughPart:	createEditor(container: HTMLElement): void {
		this.content = document.createElement('div');
		this.content.classList.add('welcomePageFocusElement');
		this.content.tabIndex = 0;
		this.content.style.outlineStyle = 'none';

		this.scrollbar = new DomScrollableElement(this.content, {
			horizontal: ScrollbarVisibility.Auto,
			vertical: ScrollbarVisibility.Auto
		});
		this.disposables.add(this.scrollbar);
		container.appendChild(this.scrollbar.getDomNode());

		this.registerFocusHandlers();
		this.registerClickHandler();

		this.disposables.add(this.scrollbar.onScroll(e => this.updatedScrollPosition()));
	}