class_docstr: Customize the behavior of `generate()` and the tests that it executes.
  
  Here is sequence of steps for executing a test combination:
    1. The test combination is evaluated for whether it should be executed in
       the given environment by calling `should_execute_combination`.
    2. If the test combination is going to be executed, then the arguments for
       all combined parameters are validated.  Some arguments can be handled in
       a special way.  This is achieved by implementing that logic in
       `ParameterModifier` instances that returned from `parameter_modifiers`.
    3. Before executing the test, `context_managers` are installed
       around it.
class_docstr_tok: ["Customize","the","behavior","of","`","generate","(",")","`","and","the","tests","that","it","executes",".","Here","is","sequence","of","steps","for","executing","a","test","combination",":","1",".","The","test","combination","is","evaluated","for","whether","it","should","be","executed","in","the","given","environment","by","calling","`","should_execute_combination","`",".","2",".","If","the","test","combination","is","going","to","be","executed",",","then","the","arguments","for","all","combined","parameters","are","validated",".","Some","arguments","can","be","handled","in","a","special","way",".","This","is","achieved","by","implementing","that","logic","in","`","ParameterModifier","`","instances","that","returned","from","`","parameter_modifiers","`",".","3",".","Before","executing","the","test",",","`","context_managers","`","are","installed","around","it","."]
docstr: Returns `ParameterModifier` instances that customize the arguments.
docstr_tok: ["Returns","`","ParameterModifier","`","instances","that","customize","the","arguments","."]
code: def parameter_modifiers(self):
      """Returns `ParameterModifier` instances that customize the arguments."""
      return []
  
imports: from collections import OrderedDict
  import contextlib
  import re
  import types
  import unittest
  from absl.testing import parameterized
  from tensorflow.python.util import tf_inspect
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 2 for calling the TestCombination obj's underlying member method code with example usage: obj.parameter_modifiers() and returns: list