ts changes

Viewer/src/configuration/mappers.ts

@@ -117,5 +117,4 @@ export class MapperManager {
 
 }
 
-export let mapperManager = new MapperManager();
-export default mapperManager;
+export let mapperManager = new MapperManager();

Viewer/src/configuration/types/index.ts

@@ -1,7 +1,8 @@
 import { minimalConfiguration } from './minimal';
 import { defaultConfiguration } from './default';
+import { ViewerConfiguration } from '../configuration';
 
-let getConfigurationType = function (type: string) {
+let getConfigurationType = function (type: string): ViewerConfiguration {
     switch (type) {
         case 'default':
             return defaultConfiguration;

Viewer/src/viewer/viewerManager.ts

@@ -3,7 +3,7 @@
 import { Observable } from 'babylonjs';
 import { AbstractViewer } from './viewer';
 
-class ViewerManager {
+export class ViewerManager {
 
     private viewers: { [key: string]: AbstractViewer };