src/vs/editor/browser/widget/diffReview.ts/DiffReview/layout
class DiffReview:	public layout(top: number, width: number, height: number): void {
		this._width = width;
		this.shadow.setTop(top - 6);
		this.shadow.setWidth(width);
		this.shadow.setHeight(this._isVisible ? 6 : 0);
		this.domNode.setTop(top);
		this.domNode.setWidth(width);
		this.domNode.setHeight(height);
		this._content.setHeight(height);
		this._content.setWidth(width);

		if (this._isVisible) {
			this.actionBarContainer.setAttribute('aria-hidden', 'false');
			this.actionBarContainer.setDisplay('block');
		} else {
			this.actionBarContainer.setAttribute('aria-hidden', 'true');
			this.actionBarContainer.setDisplay('none');
		}
	}