code: public List<GroupConversionType<FieldType<T>>> getAllConvertGroup()
     {
        List<GroupConversionType<FieldType<T>>> list = new ArrayList<GroupConversionType<FieldType<T>>>();
        List<Node> nodeList = childNode.get("convert-group");
        for(Node node: nodeList)
        {
           GroupConversionType<FieldType<T>>  type = new GroupConversionTypeImpl<FieldType<T>>(this, "convert-group", childNode, node);
           list.add(type);
        }
        return list;
     }
docs: Returns all <code>convert-group</code> elements
  @return list of <code>convert-group</code>