code: function(cb0) {
              try {
                  if (nodeId) {
                      $._.$[ns].renewNodeLease(privateNodeId, leaseTimeout, cb0);
                  } else {
                      cb0(null);
                  }
              } catch (err) {
                  cb0(err);
              }
          }
docs: /*
  Renews a lease associated with this node.
  
  @param {function(Error)} cb0 A callback with
  an error if we cannot renew lease.