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;
   PsiElement element = file.findElementAt(context.getOffset());
   while (element != null && !(element instanceof JetValueArgumentList)) {
     element = element.getParent();
   }
   if (element == null) return null;
   JetValueArgumentList argumentList = (JetValueArgumentList) element;
   JetCallElement callExpression;
   if (element.getParent() instanceof JetCallElement) {
     callExpression = (JetCallElement) element.getParent();
   } else {
     return null;
   }
   BindingContext bindingContext = AnalyzeSingleFileUtil.getContextForSingleFile((JetFile) file);
   JetExpression calleeExpression = callExpression.getCalleeExpression();
   if (calleeExpression == null) return null;
   JetSimpleNameExpression refExpression = null;
   if (calleeExpression instanceof JetSimpleNameExpression) {
     refExpression = (JetSimpleNameExpression) calleeExpression;
   } else if (calleeExpression instanceof JetConstructorCalleeExpression) {
     JetConstructorCalleeExpression constructorCalleeExpression =
         (JetConstructorCalleeExpression) calleeExpression;
     if (constructorCalleeExpression.getConstructorReferenceExpression()
         instanceof JetSimpleNameExpression) {
       refExpression =
           (JetSimpleNameExpression)
               constructorCalleeExpression.getConstructorReferenceExpression();
     }
   }
   if (refExpression != null) {
     JetScope scope = bindingContext.get(BindingContext.RESOLUTION_SCOPE, refExpression);
     DeclarationDescriptor placeDescriptor = null;
     if (scope != null) {
       placeDescriptor = scope.getContainingDeclaration();
     }
     Collection<DeclarationDescriptor> variants =
         TipsManager.getReferenceVariants(refExpression, bindingContext);
     Name refName = refExpression.getReferencedNameAsName();
     PsiReference[] references = refExpression.getReferences();
     if (references.length == 0) return null;
     ArrayList<DeclarationDescriptor> itemsToShow = new ArrayList<DeclarationDescriptor>();
     for (DeclarationDescriptor variant : variants) {
       if (variant instanceof FunctionDescriptor) {
         FunctionDescriptor functionDescriptor = (FunctionDescriptor) variant;
         if (functionDescriptor.getName().equals(refName)) {
           // todo: renamed functions?
           if (placeDescriptor != null
               && !JetVisibilityChecker.isVisible(placeDescriptor, functionDescriptor)) continue;
           itemsToShow.add(functionDescriptor);
         }
       } else if (variant instanceof ClassDescriptor) {
         ClassDescriptor classDescriptor = (ClassDescriptor) variant;
         if (classDescriptor.getName().equals(refName)) {
           // todo: renamed classes?
           for (ConstructorDescriptor constructorDescriptor : classDescriptor.getConstructors()) {
             if (placeDescriptor != null
                 && !JetVisibilityChecker.isVisible(placeDescriptor, constructorDescriptor))
               continue;
             itemsToShow.add(constructorDescriptor);
           }
         }
       }
     }
     context.setItemsToShow(ArrayUtil.toObjectArray(itemsToShow));
     return argumentList;
   }
   return null;
 }
  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;
  }
  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;
    }

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

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

    CancelableResolveSession resolveSession =
        WholeProjectAnalyzerFacade.getLazyResolveResultForFile(
            (JetFile) callNameExpression.getContainingFile());
    BindingContext bindingContext = resolveSession.resolveToElement(callNameExpression);

    JetScope scope = bindingContext.get(BindingContext.RESOLUTION_SCOPE, callNameExpression);
    DeclarationDescriptor placeDescriptor = null;
    if (scope != null) {
      placeDescriptor = scope.getContainingDeclaration();
    }

    Collection<DeclarationDescriptor> variants =
        TipsManager.getReferenceVariants(callNameExpression, bindingContext);

    Name refName = callNameExpression.getReferencedNameAsName();

    Collection<Pair<? extends DeclarationDescriptor, CancelableResolveSession>> itemsToShow =
        new ArrayList<Pair<? extends DeclarationDescriptor, CancelableResolveSession>>();
    for (DeclarationDescriptor variant : variants) {
      if (variant instanceof FunctionDescriptor) {
        FunctionDescriptor functionDescriptor = (FunctionDescriptor) variant;
        if (functionDescriptor.getName().equals(refName)) {
          // todo: renamed functions?
          if (placeDescriptor != null
              && !JetVisibilityChecker.isVisible(placeDescriptor, functionDescriptor)) {
            continue;
          }
          itemsToShow.add(Pair.create(functionDescriptor, resolveSession));
        }
      } else if (variant instanceof ClassDescriptor) {
        ClassDescriptor classDescriptor = (ClassDescriptor) variant;
        if (classDescriptor.getName().equals(refName)) {
          // todo: renamed classes?
          for (ConstructorDescriptor constructorDescriptor : classDescriptor.getConstructors()) {
            if (placeDescriptor != null
                && !JetVisibilityChecker.isVisible(placeDescriptor, constructorDescriptor)) {
              continue;
            }
            itemsToShow.add(Pair.create(constructorDescriptor, resolveSession));
          }
        }
      }
    }

    context.setItemsToShow(ArrayUtil.toObjectArray(itemsToShow));
    return argumentList;
  }