@Override
  public boolean isOutOfSources(@NotNull Project project, @NotNull VirtualFile virtualFile) {
    ProjectFileIndex index = ProjectRootManager.getInstance(project).getFileIndex();
    return !index.isUnderSourceRootOfType(virtualFile, JavaModuleSourceRootTypes.SOURCES);
  }
@Override
  public boolean isOutOfSources(@NotNull Project project, @NotNull VirtualFile virtualFile)