 import flashx.textLayout.operations.InsertTextOperation;
 import flashx.textLayout.operations.PasteOperation;
 import flashx.textLayout.operations.SplitParagraphOperation;
+import flashx.textLayout.tlf_internal;
 
 import mx.core.IViewport;
 import mx.core.ScrollUnit;

     *  when styleChanged() is called with a null argument, indicating that
     *  multiple styles have changed.
     */
    private var hostFormatsInvalid:Boolean = false;

    /**
     *  @private

     *  @private
     *  Persist the edit manager so selection formatting can be maintained.
     */
    private var _editManager:EditManager = null;
    
    /**
     *  @private
