code: def testImport(self):
      self.assertIsNotNone(problems)
  
file_path: tensor2tensor/tensor2tensor/problems_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor import problems
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the ProblemsTest obj's underlying member method code with example usage: obj.testImport() without return types