public static ImmutableList<TypeVariableName> getTypeVariables(PsiClass psiClass) {
  PsiTypeParameter[] psiTypeParameters = psiClass.getTypeParameters();

  final List<TypeVariableName> typeVariables = new ArrayList<>(psiTypeParameters.length);
  for (PsiTypeParameter psiTypeParameter : psiTypeParameters) {
    final PsiReferenceList extendsList = psiTypeParameter.getExtendsList();
    final PsiClassType[] psiClassTypes = extendsList.getReferencedTypes();

    final TypeName[] boundsTypeNames = new TypeName[psiClassTypes.length];
    for (int i = 0, size = psiClassTypes.length; i < size; i++) {
      boundsTypeNames[i] = PsiTypeUtils.getTypeName(psiClassTypes[i]);
    }

    final TypeVariableName typeVariable =
        TypeVariableName.get(psiTypeParameter.getName(), boundsTypeNames);
    typeVariables.add(typeVariable);
  }

  return ImmutableList.copyOf(typeVariables);
}
 

private static boolean extendsTestCase(PsiClass psiClass, Set<PsiClass> checkedClasses) {
  if (!checkedClasses.add(psiClass)) {
    return false;
  }
  PsiReferenceList extendsList = psiClass.getExtendsList();
  if (extendsList == null) {
    return false;
  }
  for (PsiJavaCodeReferenceElement ref : extendsList.getReferenceElements()) {
    if (JUnitUtil.TEST_CASE_CLASS.equals(ref.getQualifiedName())) {
      return true;
    }
    PsiElement clazz = ref.resolve();
    if (clazz instanceof PsiClass && extendsTestCase((PsiClass) clazz, checkedClasses)) {
      return true;
    }
  }
  return false;
}
 

/**
 * Make the class implementing Parcelable
 */
private void makeClassImplementParcelable(PsiElementFactory elementFactory, JavaCodeStyleManager styleManager) {
  final PsiClassType[] implementsListTypes = psiClass.getImplementsListTypes();
  final String implementsType = "android.os.Parcelable";

  for (PsiClassType implementsListType : implementsListTypes) {
    PsiClass resolved = implementsListType.resolve();

    // Already implements Parcelable, no need to add it
    if (resolved != null && implementsType.equals(resolved.getQualifiedName())) {
      return;
    }
  }

  PsiJavaCodeReferenceElement implementsReference =
      elementFactory.createReferenceFromText(implementsType, psiClass);
  PsiReferenceList implementsList = psiClass.getImplementsList();

  if (implementsList != null) {
    styleManager.shortenClassReferences(implementsList.add(implementsReference));
  }
}