code: function convertContinuation(t, callback) {
    log.debug('continuing from last traversal process (walker)');
    if (nextTickAvailable) {
      return process.nextTick(function() { // de-zalgo continuations
        callback(t);
      });
    }
    return callback(t);
  }
docs: /*
  This is a continuation of an earlier traversal process.
  We need to shortcut to the next step (without executing the final HTTP
  request of the last traversal again.