code: def test_map_short_last(self):
      def f(x, y):
          if y is None:
              return y
          if x is None:
              return x
          return x * y
  
      data = list(range(4))
      data2 = list(range(10))
  
      ar = self.view.map_async(f, data, data2)
      assert len(ar) == len(data)
      r = ar.get()
      assert r == list(map(f, data, data2))
  
imports: import time
  from itertools import count
  import pytest
  import ipyparallel
  from ipyparallel import error
  from .clienttest import ClusterTestCase, crash, raises_remote
label_desc: Use image node_id 6 for calling the TestLoadBalancedView obj's underlying member method code with example usage: obj.test_map_short_last() and returns: unknown, y, x