src/vs/workbench/api/common/extHostEditorTabs.ts/ExtHostEditorTab/constructor
class ExtHostEditorTab:	constructor(dto: IEditorTabDto, parentGroup: ExtHostEditorTabGroup, activeTabIdGetter: () => string) {
		this._activeTabIdGetter = activeTabIdGetter;
		this._parentGroup = parentGroup;
		this.acceptDtoUpdate(dto);
	}