rem: }; 
add: } 
context: qx.Proto._modifyElement = function(propValue, propOldValue, propData){  this._isCreated = qx.util.Validation.isValidElement(propValue);  if (propOldValue)  {    propOldValue.qx_Widget = null;  };  if (propValue)  {    // add reference to widget instance    propValue.qx_Widget = this;    // link element and style reference    this._element = propValue;    this._style = propValue.style;  }  else  {    this._element = null;    this._style = null;  };  return true;};
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