src/vs/workbench/api/common/extHostEditorTabs.ts/ExtHostEditorTabs/_findExtHostTabFromApi
class ExtHostEditorTabs:	private _findExtHostTabFromApi(apiTab: vscode.Tab): ExtHostEditorTab | undefined {
		for (const group of this._extHostTabGroups) {
			for (const tab of group.tabs) {
				if (tab.apiObject === apiTab) {
					return tab;
				}
			}
		}
		return;
	}