private static @NotNull Set<Module> getExportBackwardDependencies(@NotNull Module fromModule, Module @NotNull [] allModules) {
    Set<Module> result = new HashSet<>();
    for (Module module : allModules) {
      ModuleRootManager moduleRootManager = ModuleRootManager.getInstance(module);
      OrderEntry[] orderEntries = moduleRootManager.getOrderEntries();
      for (OrderEntry orderEntry : orderEntries) {
        if (orderEntry instanceof ModuleOrderEntry && ((ExportableOrderEntry)orderEntry).isExported() &&
            fromModule == ((ModuleOrderEntry)orderEntry).getModule()) {
          result.addAll(getDirectBackwardDependencies(module, allModules));
        }
      }
    }
    return result;
  }
private static @NotNull Set<Module> getExportBackwardDependencies(@NotNull Module fromModule, Module @NotNull [] allModules)