code: function executeLastHttpRequest(t, callback) {
    // always check for aborted before doing an HTTP request
    if (t.aborted) {
      return abortTraversal.callCallbackOnAbort(t);
    }
    httpRequests.executeHttpRequest(
        t,
        t.requestModuleInstance,
        t.lastMethod,
        t.lastMethodName,
        t.callback
    );
  }
docs: /*
  Execute the last http request in a traversal that ends in
  post/put/patch/delete and call t.callback immediately when done.
   TODO Why is this different from when do a GET at the end of the traversal? Probably only because the HTTP method is configurable here (with t.lastMethod), we might be able to unify this with the fetch_resource/fetch_last_resource transform.