code: def testCorrectFormatWhenNoColocationsWereActive(self):
      colocation_dict = {}
      summary = (
          error_interpolation._compute_colocation_summary_from_dict(
              "node_name", colocation_dict, prefix="  "
          )
      )
      self.assertIn("node_name", summary)
      self.assertIn("No node-device colocations", summary)
  
imports: import collections
  import os
  import re
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import error_interpolation
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.framework import traceable_stack
  from tensorflow.python.ops import control_flow_assert
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import script_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 2 for calling the ComputeColocationSummaryFromOpTest obj's underlying member method code with example usage: obj.testCorrectFormatWhenNoColocationsWereActive() without return types