@NotNull
  private static List<VirtualFile> getFilesToPackage(@NotNull AnActionEvent e, @NotNull Project project) {
    final VirtualFile[] files = e.getData(CommonDataKeys.VIRTUAL_FILE_ARRAY);
    if (files == null) return Collections.emptyList();

    List<VirtualFile> result = new ArrayList<>();
    ProjectFileIndex fileIndex = ProjectRootManager.getInstance(project).getFileIndex();
    final CompilerManager compilerManager = CompilerManager.getInstance(project);
    for (VirtualFile file : files) {
      if (file == null || file.isDirectory() ||
          fileIndex.isUnderSourceRootOfType(file, JavaModuleSourceRootTypes.SOURCES) && compilerManager.isCompilableFileType(file.getFileType())) {
        return Collections.emptyList();
      }
      final Collection<? extends Artifact> artifacts = ArtifactBySourceFileFinder.getInstance(project).findArtifacts(file);
      for (Artifact artifact : artifacts) {
        if (!StringUtil.isEmpty(artifact.getOutputPath())) {
          result.add(file);
          break;
        }
      }
    }
    return result;
  }
@NotNull
  private static List<VirtualFile> getFilesToPackage(@NotNull AnActionEvent e, @NotNull Project project)