code: function C(iid, left) {
          var aret;
          if (sandbox.analysis && sandbox.analysis.conditional) {
              aret = sandbox.analysis.conditional(iid, left);
              if (aret) {
                  left = aret.result;
              }
          }
  
          lastVal = left;
          return (lastComputedValue = left);
      }
docs: Expression in conditional