rem: }; 
add: } 
context: qx.Proto.isMaterialized = function() {  var el=this._element; return this._initialLayoutDone && this._isDisplayable && qx.dom.DomStyle.getStyleProperty(el, qx.constant.Style.PROPERTY_DISPLAY) != qx.constant.Core.NONE && qx.dom.DomStyle.getStyleProperty(el, qx.constant.Style.PROPERTY_VISIBILITY) != qx.constant.Core.HIDDEN && el.offsetWidth > 0 && el.offsetHeight > 0;};
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