Clear importer data after import.

source/import/importer.js

@@ -344,6 +344,9 @@ OV.Importer = class
             onError : function () {
                 let message = importer.GetMessage ();
                 callbacks.onError (new OV.ImportError (OV.ImportErrorCode.ImportFailed, message));
+            },
+            onComplete : function () {
+                importer.Clear ();
             }
         });
     }

source/import/importerbase.js

@@ -36,17 +36,20 @@ OV.ImporterBase = class
     {
         if (this.error) {
             callbacks.onError ();
+            callbacks.onComplete ();
             return;
         }
 
         if (OV.IsModelEmpty (this.model)) {
             this.error = true;
             callbacks.onError ();
+            callbacks.onComplete ();
             return;
         }
 
         OV.FinalizeModel (this.model, this.callbacks.getDefaultMaterial);
         callbacks.onSuccess ();
+        callbacks.onComplete ();
     }
 
     CanImportExtension (extension)

test/utils/testfiles.js

@@ -84,6 +84,9 @@ module.exports =
             },
             onError : function () {
                 onReady (model);
+            },
+            onComplete : function () {
+                
             }
         });
     }