     {
         var loaderInfo :LoaderInfo = _loader.contentLoaderInfo;
         if (loaderInfo.bytesTotal == 0 || loaderInfo.bytesLoaded != loaderInfo.bytesTotal) {
-
-            throw new IllegalOperationError("SWF has not completed loading");
+            throw new IllegalOperationError("SWF has not completed loading.");
         }
     }
 

    /**
     * Checks if a symbol exists in the library.
     *
     * @throws IllegalOperationError when the swf has not completed loading.
     */
    public function isSymbol (className :String) :Boolean
    {

    /**
     * Retrieves a class definition from the loaded swf.
     *
     * @throws flash.errors.IllegalOperationError when the swf has not completed loading
     * or the class does not exist.
     */
    public function getClass (className :String) :Class
    {
