traverses the tree to find the FeatureDiagramTreeEditPart with model that has id equal to parentId
and adds the paremeter to the tree as a child of this edit part
adds temporal attribute to every element in the DOM model,
this attribute is not saved to the XML file when performing
doSave() or doSaveAs() operations
Helper class to run ant targets through the ant launch configuration
Usage:
AntHelper helper = new AntHelper(new File("build.xml"));
helper.execute( null, "target1, target2" );
...