private Object[] processPackage(final PsiPackage aPackage) {
    final ArrayList<Object> list = new ArrayList<Object>();
    final int startOffset =
        StringUtil.isEmpty(aPackage.getName()) ? 0 : aPackage.getQualifiedName().length() + 1;
    final GlobalSearchScope scope = getScope();
    for (final PsiPackage subPackage : aPackage.getSubPackages(scope)) {
      final String shortName = subPackage.getQualifiedName().substring(startOffset);
      if (JavaPsiFacade.getInstance(subPackage.getProject())
          .getNameHelper()
          .isIdentifier(shortName)) {
        list.add(subPackage);
      }
    }

    final PsiClass[] classes = aPackage.getClasses(scope);
    final Map<CustomizableReferenceProvider.CustomizationKey, Object> options = getOptions();
    if (options != null) {
      final boolean instantiatable =
          JavaClassReferenceProvider.INSTANTIATABLE.getBooleanValue(options);
      final boolean concrete = JavaClassReferenceProvider.CONCRETE.getBooleanValue(options);
      final boolean notInterface =
          JavaClassReferenceProvider.NOT_INTERFACE.getBooleanValue(options);
      final boolean notEnum = JavaClassReferenceProvider.NOT_ENUM.getBooleanValue(options);
      final ClassKind classKind = getClassKind();

      for (PsiClass clazz : classes) {
        if (isClassAccepted(clazz, classKind, instantiatable, concrete, notInterface, notEnum)) {
          list.add(clazz);
        }
      }
    } else {
      ContainerUtil.addAll(list, classes);
    }
    return list.toArray();
  }
  @Override
  @NotNull
  public Object[] getVariants() {
    Set<PsiPackage> subPackages = new HashSet<>();
    for (PsiPackage psiPackage : getContext()) {
      subPackages.addAll(
          Arrays.asList(psiPackage.getSubPackages(myReferenceSet.getResolveScope())));
    }

    return subPackages.toArray();
  }