code: def testListCompletions(self):
      completions = completion.Completions(["red", "green", "blue"])
      self.assertIn("0", completions)
      self.assertIn("1", completions)
      self.assertIn("2", completions)
      self.assertNotIn("3", completions)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from fire import completion
  from fire import test_components
  from fire import testutils
label_desc: Use image node_id 4 for calling the TabCompletionTest obj's underlying member method code with example usage: obj.testListCompletions() without return types