public Set<PsiFile> getDependentFilesInPackage(PsiPackage pack, PsiPackage depPack) {
    Set<PsiFile> psiFiles = new HashSet<>();
    final Map<PsiPackage, Set<PsiFile>> map = myFilesInDependentPackages.get(pack);
    if (map != null){
      psiFiles = map.get(depPack);
    }
    if (psiFiles == null) {
      psiFiles = new HashSet<>();
    }
    return psiFiles;
  }
public Set<PsiFile> getDependentFilesInPackage(PsiPackage pack, PsiPackage depPack)