@Override
    public void visitJetFile(@NotNull JetFile file) {
      MutablePackageFragmentDescriptor packageFragment = getOrCreatePackageFragmentForFile(file);
      c.getPackageFragments().put(file, packageFragment);
      c.addFile(file);

      PackageViewDescriptor packageView =
          packageFragment.getContainingDeclaration().getPackage(packageFragment.getFqName());
      ChainedScope rootPlusPackageScope =
          new ChainedScope(
              packageView, "Root scope for " + file, packageView.getMemberScope(), outerScope);
      WriteThroughScope packageScope =
          new WriteThroughScope(
              rootPlusPackageScope,
              packageFragment.getMemberScope(),
              new TraceBasedRedeclarationHandler(trace),
              "package in file " + file.getName());
      packageScope.changeLockLevel(WritableScope.LockLevel.BOTH);
      c.getFileScopes().put(file, packageScope);

      if (file.isScript()) {
        scriptHeaderResolver.processScriptHierarchy(c, file.getScript(), packageScope);
      }

      prepareForDeferredCall(packageScope, packageFragment, file);
    }
  private static void forceResolvePackageDeclarations(
      @NotNull Collection<JetFile> files, @NotNull KotlinCodeAnalyzer session) {
    for (JetFile file : files) {
      // SCRIPT: not supported
      if (file.isScript()) continue;

      FqName packageFqName = file.getPackageFqName();

      // make sure we create a package descriptor
      PackageViewDescriptor packageDescriptor =
          session.getModuleDescriptor().getPackage(packageFqName);
      if (packageDescriptor.isEmpty()) {
        LOG.warn(
            "No descriptor found for package "
                + packageFqName
                + " in file "
                + file.getName()
                + "\n"
                + file.getText());
        session.forceResolveAll();
        continue;
      }

      for (JetDeclaration declaration : file.getDeclarations()) {
        if (declaration instanceof JetFunction) {
          JetFunction jetFunction = (JetFunction) declaration;
          Name name = jetFunction.getNameAsSafeName();
          Collection<FunctionDescriptor> functions =
              packageDescriptor.getMemberScope().getFunctions(name, LookupLocation.NO_LOCATION);
          for (FunctionDescriptor descriptor : functions) {
            ForceResolveUtil.forceResolveAllContents(descriptor);
          }
        } else if (declaration instanceof JetProperty) {
          JetProperty jetProperty = (JetProperty) declaration;
          Name name = jetProperty.getNameAsSafeName();
          Collection<VariableDescriptor> properties =
              packageDescriptor.getMemberScope().getProperties(name, LookupLocation.NO_LOCATION);
          for (VariableDescriptor descriptor : properties) {
            ForceResolveUtil.forceResolveAllContents(descriptor);
          }
        } else if (declaration instanceof JetClassOrObject) {
          // Do nothing: we are not interested in classes
        } else {
          LOG.error(
              "Unsupported declaration kind: "
                  + declaration
                  + " in file "
                  + file.getName()
                  + "\n"
                  + file.getText());
        }
      }
    }
  }
  @NotNull
  public static Collection<JetFile> allFilesInNamespaces(
      BindingContext bindingContext, Collection<JetFile> files) {
    // todo: we use Set and add given files but ignoring other scripts because something non-clear
    // kept in binding
    // for scripts especially in case of REPL

    HashSet<FqName> names = new HashSet<FqName>();
    for (JetFile file : files) {
      if (!file.isScript()) {
        names.add(JetPsiUtil.getFQName(file));
      }
    }

    HashSet<JetFile> answer = new HashSet<JetFile>();
    answer.addAll(files);

    for (FqName name : names) {
      NamespaceDescriptor namespaceDescriptor =
          bindingContext.get(BindingContext.FQNAME_TO_NAMESPACE_DESCRIPTOR, name);
      Collection<JetFile> jetFiles = bindingContext.get(NAMESPACE_TO_FILES, namespaceDescriptor);
      if (jetFiles != null) answer.addAll(jetFiles);
    }

    List<JetFile> sortedAnswer = new ArrayList<JetFile>(answer);
    Collections.sort(
        sortedAnswer,
        new Comparator<JetFile>() {
          @NotNull
          private String path(JetFile file) {
            VirtualFile virtualFile = file.getVirtualFile();
            assert virtualFile != null : "VirtualFile is null for JetFile: " + file.getName();
            return virtualFile.getPath();
          }

          @Override
          public int compare(JetFile first, JetFile second) {
            return path(first).compareTo(path(second));
          }
        });

    return sortedAnswer;
  }