VizProject project = new VizProject();  project.setDir(dir);  project.setFile(file);  projects.addElement(project);  return project;  }
        private VizProject getProject(String dir, String file) {            Enumeration enum = projects.elements();            while (enum.hasMoreElements()) {                VizProject project = (VizProject) enum.nextElement();                if (dir.equals(project.getDir()) && file.equals(project.getFile()))                    return project;            }