private void setUpContainingClassComboBox() {
    String containingClassName = mySettings.getContainingClassName();
    PsiClass targetClass = JavaPsiFacade.getInstance(myProject).findClass(containingClassName, GlobalSearchScope.allScope(myProject));
    if (targetClass == null || targetClass instanceof SyntheticElement) {
      if (!containingClassName.isEmpty()) {
        myClassComboBox.addItem(containingClassName);
      }

      if (!containingClassName.equals(CommonClassNames.JAVA_LANG_OBJECT)) {
        myClassComboBox.addItem(CommonClassNames.JAVA_LANG_OBJECT);
      }

      return;
    }

    for (PsiClass aClass : PsiUtil.iterateSupers(targetClass, true)) {
      myClassComboBox.addItem(aClass.getQualifiedName());
    }
  }
private void setUpContainingClassComboBox()