code: function linkParent(original, branch, parentPayload, nextPayload)
  {
    // get proper name
    var normalized = normalize(branch);
  
    var result = original(branch, parentPayload, nextPayload);
  
    // add normalized handle reference
    // skip if it's empty string
    if (normalized)
    {
      result.__proto__[normalized] = parentPayload;
    }
  
    // add user object reference
    if (parentPayload.user)
    {
      result.__proto__['user'] = parentPayload.user;
    }
  
    return result;
  }
docs: Wraps original linkParent method
  and adds normalized handle reference to the parent object
  
  @param   {function} original - original linkParent method
  @param   {string} branch - current branch of the payload
  @param   {object} parentPayload - parent payload object
  @param   {mixed} nextPayload - next step payload object
  @returns {mixed} - augmented next step payload object