@Override
    public boolean isValid(MavenId id, MavenIndicesManager manager, ConvertContext context) {
      if (StringUtil.isEmpty(id.getGroupId())) {
        for (String each : MavenArtifactUtil.DEFAULT_GROUPS) {
          id = new MavenId(each, id.getArtifactId(), id.getVersion());
          if (super.isValid(id, manager, context)) return true;
        }
        return false;
      }
      return super.isValid(id, manager, context);
    }
@Override
    public boolean isValid(MavenId id, MavenIndicesManager manager, ConvertContext context)