Update import

examples/docmanager/src/index.ts

@@ -10,14 +10,14 @@ import {
   KeymapManager
 } from 'phosphor-keymap';
 
-import {
-  FileHandler, DocumentManager
-} from 'jupyter-js-docmanager';
-
 import {
   ContentsManager
 } from 'jupyter-js-services';
 
+import {
+  FileHandler, DocumentManager
+} from 'jupyter-js-ui/lib/docmanager';
+
 import {
   getBaseUrl
 } from 'jupyter-js-utils';