private static JetValueArgumentList findCall(CreateParameterInfoContext context) {
    // todo: calls to this constructors, when we will have auxiliary constructors
    PsiFile file = context.getFile();
    if (!(file instanceof JetFile)) {
      return null;
    }

    JetValueArgumentList argumentList =
        PsiTreeUtil.getParentOfType(
            file.findElementAt(context.getOffset()), JetValueArgumentList.class);
    if (argumentList == null) {
      return null;
    }

    final JetSimpleNameExpression callNameExpression = getCallSimpleNameExpression(argumentList);
    if (callNameExpression == null) {
      return null;
    }

    PsiReference[] references = callNameExpression.getReferences();
    if (references.length == 0) {
      return null;
    }

    ResolutionFacade resolutionFacade =
        ResolvePackage.getResolutionFacade(callNameExpression.getContainingJetFile());
    final BindingContext bindingContext =
        resolutionFacade.analyze(callNameExpression, BodyResolveMode.FULL);
    ModuleDescriptor moduleDescriptor = resolutionFacade.findModuleDescriptor(callNameExpression);

    JetScope scope = bindingContext.get(BindingContext.RESOLUTION_SCOPE, callNameExpression);
    final DeclarationDescriptor placeDescriptor;
    if (scope != null) {
      placeDescriptor = scope.getContainingDeclaration();
    } else {
      placeDescriptor = null;
    }
    Function1<DeclarationDescriptor, Boolean> visibilityFilter =
        new Function1<DeclarationDescriptor, Boolean>() {
          @Override
          public Boolean invoke(DeclarationDescriptor descriptor) {
            if (placeDescriptor == null) return true;
            if (!(descriptor instanceof DeclarationDescriptorWithVisibility)) return true;
            return CorePackage.isVisible(
                (DeclarationDescriptorWithVisibility) descriptor,
                placeDescriptor,
                bindingContext,
                callNameExpression);
          }
        };

    final Name refName = callNameExpression.getReferencedNameAsName();

    Function1<Name, Boolean> nameFilter =
        new Function1<Name, Boolean>() {
          @Override
          public Boolean invoke(Name name) {
            return name.equals(refName);
          }
        };
    Collection<DeclarationDescriptor> variants =
        new ReferenceVariantsHelper(
                bindingContext, moduleDescriptor, file.getProject(), visibilityFilter)
            .getReferenceVariants(
                callNameExpression,
                new DescriptorKindFilter(
                    DescriptorKindFilter.FUNCTIONS_MASK | DescriptorKindFilter.CLASSIFIERS_MASK,
                    Collections.<DescriptorKindExclude>emptyList()),
                nameFilter,
                false,
                false);

    Collection<Pair<? extends DeclarationDescriptor, ResolutionFacade>> itemsToShow =
        new ArrayList<Pair<? extends DeclarationDescriptor, ResolutionFacade>>();
    for (DeclarationDescriptor variant : variants) {
      if (variant instanceof FunctionDescriptor) {
        // todo: renamed functions?
        itemsToShow.add(Pair.create((FunctionDescriptor) variant, resolutionFacade));
      } else if (variant instanceof ClassDescriptor) {
        // todo: renamed classes?
        for (ConstructorDescriptor constructorDescriptor :
            ((ClassDescriptor) variant).getConstructors()) {
          itemsToShow.add(Pair.create(constructorDescriptor, resolutionFacade));
        }
      }
    }

    context.setItemsToShow(ArrayUtil.toObjectArray(itemsToShow));
    return argumentList;
  }
 @Override
 public void showParameterInfo(
     @NotNull JetValueArgumentList element, @NotNull CreateParameterInfoContext context) {
   context.showHint(element, element.getTextRange().getStartOffset(), this);
 }