public @NotNull List<IdeaPluginDescriptor> getInstalledDescriptors() {
    assert myInstalledPanel != null;

    return myInstalledPanel
      .getGroups()
      .stream()
      .filter(group -> !group.excluded)
      .flatMap(group -> group.plugins.stream())
      .map(ListPluginComponent::getPluginDescriptor)
      .collect(Collectors.toList());
  }
public @NotNull List<IdeaPluginDescriptor> getInstalledDescriptors()