 import mx.managers.IActiveWindowManager;
 import mx.managers.ILayoutManager;
 import mx.managers.ISystemManager;
+import mx.managers.SystemManager;
 import mx.managers.ToolTipManager;
 import mx.styles.CSSStyleDeclaration;
 import mx.styles.StyleManager;

    /**
     *  @private
     */
    private var synchronousResize:Boolean = false;

    /**

import flash.ui.ContextMenuItem;
import flash.utils.setInterval;

import mx.core.EventPriority;
import mx.core.FlexGlobals;
import mx.core.IInvalidating;
import mx.core.InteractionMode;
