class_docstr: Run the test in Graph or Eager mode.
  
  The optional `mode` parameter controls the test's execution mode.  Its
  accepted values are "graph" or "eager" literals.
code: def parameter_modifiers(self):
      return [test_combinations.OptionalParameter("mode")]
  
file_path: tensorflow/tensorflow/python/framework/combinations.py
imports: import functools
  from tensorflow.python import tf2
  from tensorflow.python.eager import context
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_combinations
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 2 for calling the EagerGraphCombination obj's underlying member method code with example usage: obj.parameter_modifiers() and returns: list