code: def testStringPoolMultiple(self):
      expectedVal1 = "mul"
      expectedVal2 = "tiple"
  
      p = Pool()
      p.add("foo.bar", expectedVal1)
      p.add("foo.bar", expectedVal2)
  
      self.assertEqualVector(p["foo.bar"], [expectedVal1, expectedVal2])
  
imports: from essentia_test import *
label_desc: Use image node_id 16 for calling the TestPool obj's underlying member method code with example usage: obj.testStringPoolMultiple() without return types