private ClassDescriptor recordClassForFunction(FunctionDescriptor funDescriptor) {
    ClassDescriptor classDescriptor;
    int arity = funDescriptor.getValueParameters().size();

    classDescriptor =
        new ClassDescriptorImpl(
            funDescriptor.getContainingDeclaration(),
            Collections.<AnnotationDescriptor>emptyList(),
            Modality.FINAL,
            Name.special("<closure>"));
    ((ClassDescriptorImpl) classDescriptor)
        .initialize(
            false,
            Collections.<TypeParameterDescriptor>emptyList(),
            Collections.singleton(
                (funDescriptor.getReceiverParameter().exists()
                        ? JetStandardClasses.getReceiverFunction(arity)
                        : JetStandardClasses.getFunction(arity))
                    .getDefaultType()),
            JetScope.EMPTY,
            Collections.<ConstructorDescriptor>emptySet(),
            null);

    assert PsiCodegenPredictor.checkPredictedClassNameForFun(
        bindingContext, funDescriptor, classDescriptor);
    bindingTrace.record(CLASS_FOR_FUNCTION, funDescriptor, classDescriptor);
    return classDescriptor;
  }
  @Override
  public void visitNamedFunction(JetNamedFunction function) {
    FunctionDescriptor functionDescriptor =
        (FunctionDescriptor) bindingContext.get(DECLARATION_TO_DESCRIPTOR, function);
    // working around a problem with shallow analysis
    if (functionDescriptor == null) return;
    DeclarationDescriptor containingDeclaration = functionDescriptor.getContainingDeclaration();
    if (containingDeclaration instanceof ClassDescriptor) {
      nameStack.push(peekFromStack(nameStack) + '$' + function.getName());
      super.visitNamedFunction(function);
      nameStack.pop();
    } else if (containingDeclaration instanceof NamespaceDescriptor) {
      String peek = peekFromStack(nameStack);
      if (peek.isEmpty()) {
        peek = JvmAbi.PACKAGE_CLASS;
      } else {
        peek += "/" + JvmAbi.PACKAGE_CLASS;
      }
      nameStack.push(peek + '$' + function.getName());
      super.visitNamedFunction(function);
      nameStack.pop();
    } else {
      String name = inventAnonymousClassName(function);
      ClassDescriptor classDescriptor = recordClassForFunction(functionDescriptor);
      recordClosure(
          bindingTrace,
          function,
          classDescriptor,
          peekFromStack(classStack),
          JvmClassName.byInternalName(name),
          true);

      classStack.push(classDescriptor);
      nameStack.push(name);
      super.visitNamedFunction(function);
      nameStack.pop();
      classStack.pop();
    }
  }