* @cfg {String} title The title for this panel
* @cfg {Array} adjustments Values to <b>add</b> to the width/height when doing a {@link #fitToFrame} (default is [0, 0])
* @cfg {String} url Calls {@link #setUrl} with this value
+ * @cfg {String} region (center|north|south|east|west) which region to put this panel on (when used with xtype constructors)
* @cfg {String/Object} params When used with {@link #url}, calls {@link #setUrl} with this value
* @cfg {Boolean} loadOnce When used with {@link #url}, calls {@link #setUrl} with this value
* @constructor