rem:  if (this.getTree().getExcludeSpecificTreeLines().length > 0) { this._updateIndent(); } else { this._updateLastColumn(); 
add: var t = this.getTree(); if (t) {   if (t.getExcludeSpecificTreeLines().length > 0) { this._updateIndent(); } else { this._updateLastColumn(); } 
context: qx.Proto._modifyAlwaysShowPlusMinusSymbol = function(propValue, propOldValue, propData){  // we need the whole indent process if certain tree lines are to be excluded  if (this.getTree().getExcludeSpecificTreeLines().length > 0) {    this._updateIndent();  } else {    this._updateLastColumn();  }  return true;}
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/aa238b72cba21917d315d665de879a349403b84e/TreeFolder.js/clean/qooxdoo/frontend/framework/source/class/qx/ui/treefullcontrol/TreeFolder.js