protected void setUp() throws Exception {
   javaProject = new JavaProjectKit();
   root = javaProject.createSourceFolder("src");
   javaProject.createCompilationUnit(root, "testdata/src", "typetraverser/Samples.java");
   JavaProjectKit.waitForBuild();
   javaProject.assertNoErrors();
 }
 protected void tearDown() throws Exception {
   javaProject.destroy();
 }