private static boolean containsAllCases(GrSwitchStatement statement) {
    final GrCaseSection[] sections = statement.getCaseSections();
    for (GrCaseSection section : sections) {
      if (section.isDefault()) return true;
    }

    final GrExpression condition = statement.getCondition();
    if (!(condition instanceof GrReferenceExpression)) return false;

    PsiType type = TypesUtil.unboxPrimitiveTypeWrapper(getNominalTypeNoRecursion(condition));
    if (type == null) return false;

    if (type instanceof PsiPrimitiveType) {
      if (type == PsiType.BOOLEAN) return sections.length == 2;
      if (type == PsiType.BYTE || type == PsiType.CHAR) return sections.length == 128;
      return false;
    }

    if (type instanceof PsiClassType) {
      final PsiClass resolved = ((PsiClassType) type).resolve();
      if (resolved != null && resolved.isEnum()) {
        int enumConstantCount = 0;
        final PsiField[] fields = resolved.getFields();
        for (PsiField field : fields) {
          if (field instanceof PsiEnumConstant) enumConstantCount++;
        }

        if (sections.length == enumConstantCount) return true;
      }
    }

    return false;
  }
  @Nullable
  public static PsiType getExpectedClosureReturnType(GrClosableBlock closure) {
    final Set<PsiType> expectedTypes = getDefaultExpectedTypes(closure);

    List<PsiType> expectedReturnTypes = new ArrayList<PsiType>();
    for (PsiType expectedType : expectedTypes) {
      if (!(expectedType instanceof PsiClassType)) return null;

      final PsiClassType.ClassResolveResult resolveResult =
          ((PsiClassType) expectedType).resolveGenerics();
      final PsiClass resolved = resolveResult.getElement();
      if (resolved == null
          || !(GroovyCommonClassNames.GROOVY_LANG_CLOSURE.equals(resolved.getQualifiedName())))
        return null;

      final PsiTypeParameter[] typeParameters = resolved.getTypeParameters();
      if (typeParameters.length != 1) return null;

      final PsiTypeParameter expected = typeParameters[0];
      final PsiType expectedReturnType = resolveResult.getSubstitutor().substitute(expected);
      if (expectedReturnType == PsiType.VOID || expectedReturnType == null) return null;

      expectedReturnTypes.add(expectedReturnType);
    }

    return TypesUtil.getLeastUpperBoundNullable(expectedReturnTypes, closure.getManager());
  }
  private static boolean generateDelegate(GrChangeInfoImpl grInfo) {
    final GrMethod method = grInfo.getMethod();
    final PsiClass psiClass = method.getContainingClass();
    GrMethod newMethod = (GrMethod) method.copy();
    newMethod = (GrMethod) psiClass.addAfter(newMethod, method);
    StringBuilder buffer = new StringBuilder();
    buffer.append("\n");
    if (method.isConstructor()) {
      buffer.append("this");
    } else {
      if (!PsiType.VOID.equals(method.getReturnType())) {
        buffer.append("return ");
      }
      buffer.append(
          GrChangeSignatureUtil.getNameWithQuotesIfNeeded(
              grInfo.getNewName(), method.getProject()));
    }

    generateParametersForDelegateCall(grInfo, method, buffer);

    final GrCodeBlock codeBlock =
        GroovyPsiElementFactory.getInstance(method.getProject())
            .createMethodBodyFromText(buffer.toString());
    newMethod.setBlock(codeBlock);
    newMethod.getModifierList().setModifierProperty(PsiModifier.ABSTRACT, false);

    CodeStyleManager.getInstance(method.getProject()).reformat(newMethod);
    return processPrimaryMethodInner(grInfo, method, null);
  }
    @Override
    public void visitAnnotationArrayInitializer(GrAnnotationArrayInitializer arrayInitializer) {
      final GrAnnotationNameValuePair nameValuePair =
          PsiTreeUtil.getParentOfType(
              arrayInitializer,
              GrAnnotationNameValuePair.class,
              true,
              GrDefaultAnnotationValue.class);
      if (nameValuePair != null) {

        final PsiClass annot = ResolveUtil.resolveAnnotation(arrayInitializer);
        if (annot == null) return;

        final String name = nameValuePair.getName();
        if (name == null) return;

        final PsiMethod[] attrs = annot.findMethodsByName(name, false);
        if (attrs.length > 0) {
          PsiType type = attrs[0].getReturnType();
          while (type instanceof PsiArrayType) type = ((PsiArrayType) type).getComponentType();
          if (type != null && isAcceptableAnnotationValueType(type)) {
            myResult = createSimpleSubTypeResult(type);
          }
        }
      } else {
        final GrAnnotationMethod method =
            PsiTreeUtil.getParentOfType(arrayInitializer, GrAnnotationMethod.class);
        assert method != null;

        PsiType type = method.getReturnType();

        int count = 1;
        PsiElement parent = arrayInitializer.getParent();
        while (parent instanceof GrAnnotationArrayInitializer) {
          count++;
          parent = parent.getParent();
        }

        while (type instanceof PsiArrayType && count > 0) {
          type = ((PsiArrayType) type).getComponentType();
          count--;
        }
        if (type != null && isAcceptableAnnotationValueType(type)) {
          myResult = createSimpleSubTypeResult(type);
        }
      }
    }
    @Override
    public void visitAnnotationNameValuePair(GrAnnotationNameValuePair nameValuePair) {
      if (myExpression.equals(nameValuePair.getValue())) {
        final PsiClass annot = ResolveUtil.resolveAnnotation(nameValuePair.getParent());
        if (annot != null) {
          final String name = nameValuePair.getName();
          if (name != null) {
            final PsiMethod[] attrs = annot.findMethodsByName(name, false);
            if (attrs.length > 0) {
              PsiType type = attrs[0].getReturnType();
              while (type instanceof PsiArrayType) type = ((PsiArrayType) type).getComponentType();
              if (type != null && isAcceptableAnnotationValueType(type)) {
                myResult = createSimpleSubTypeResult(type);
              }
            }
          } else {
            final PsiMethod[] valueAttr = annot.findMethodsByName("value", false);
            boolean canHaveSimpleExpr = valueAttr.length > 0;
            final PsiMethod[] methods = annot.getMethods();
            for (PsiMethod method : methods) {
              if (!("value".equals(method.getName())
                  || method instanceof PsiAnnotationMethod
                      && ((PsiAnnotationMethod) method).getDefaultValue() != null)) {
                canHaveSimpleExpr = false;
              }
            }

            if (canHaveSimpleExpr) {
              PsiType type = valueAttr[0].getReturnType();
              while (type instanceof PsiArrayType) type = ((PsiArrayType) type).getComponentType();
              if (type != null && isAcceptableAnnotationValueType(type)) {
                myResult = createSimpleSubTypeResult(type);
              }
            }
          }
        }
      }
    }