@Nullable
  @Override
  public String getNamePrefix() {
    if (DomUtil.hasXml(getQualifiedName())) {
      return null;
    }

    final IdeaPlugin plugin = getParentOfType(IdeaPlugin.class, false);
    if (plugin == null) return null;

    return StringUtil.notNullize(plugin.getPluginId(), PluginManagerCore.CORE_PLUGIN_ID);
  }
@Nullable
  @Override
  public String getNamePrefix()