src/vs/workbench/browser/parts/editor/editorStatus.ts/EditorStatus/onTabFocusModeChange
class EditorStatus:	private onTabFocusModeChange(): void {
		const info: StateDelta = { type: 'tabFocusMode', tabFocusMode: TabFocus.getTabFocusMode() };

		this.updateState(info);
	}