docs: function (mml) {
        if (this.SplitAttribute(mml,"children").length === 1) {
          var child = (mml.data.length === 1 && mml.data[0].inferred ? mml.data[0] : mml);
          if (child.data[0] && child.data[0].collapsible) {
            //
            //  Move menclose into the maction element
            //
            var maction = child.data[0];
            child.SetData(0,maction.data[1]);
            maction.SetData(1,mml);
            mml = maction;
          }
        }
        return mml;
      }