src/vs/editor/browser/viewParts/editorScrollbar/editorScrollbar.ts/EditorScrollbar/onThemeChanged
class EditorScrollbar:	public override onThemeChanged(e: viewEvents.ViewThemeChangedEvent): boolean {
		this.scrollbar.updateClassName('editor-scrollable' + ' ' + getThemeTypeSelector(this._context.theme.type));
		return true;
	}