code: function c_113_120(json) {
              // 原本的布局风格
              var ocs = json.data.currentstyle;
              delete json.data.currentstyle;
              // 为 1.2 选择模板，同时保留老版本文件的皮肤
              if (ocs == "bottom") {
                  json.template = "structure";
                  json.theme = "snow";
              } else if (ocs == "default") {
                  json.template = "default";
                  json.theme = "classic";
              }
              traverse(json, function(node) {
                  var data = node.data;
                  // 升级优先级、进度图标
                  if ("PriorityIcon" in data) {
                      data.priority = data.PriorityIcon;
                      delete data.PriorityIcon;
                  }
                  if ("ProgressIcon" in data) {
                      data.progress = 1 + (data.ProgressIcon - 1 << 1);
                      delete data.ProgressIcon;
                  }
                  // 删除过时属性
                  delete data.point;
                  delete data.layout;
              });
          }
docs: 脑图数据升级
  v1.1.3 => v1.2.0