src/vs/workbench/browser/parts/editor/tabsTitleControl.ts/TabsTitleControl/setActive
class TabsTitleControl:	setActive(isGroupActive: boolean): void {

		// Activity has an impact on each tab's active indication
		this.forEachTab((editor, index, tabContainer, tabLabelWidget, tabLabel, tabActionBar) => {
			this.redrawTabActiveAndDirty(isGroupActive, editor, tabContainer, tabActionBar);
		});

		// Activity has an impact on the toolbar, so we need to update and layout
		this.updateEditorActionsToolbar();
		this.layout(this.dimensions);
	}