class_docstr: A simple class that can be used for testing framework-agnostic logic.
  
  Implements a simple `add()` method for adding a value to
  `self.prop_b`.
code: def _add_tf(self, value):
      return tf.add(self.prop_b, value)
  
imports: from abc import ABCMeta, abstractmethod
  from gymnasium.spaces import Discrete
  import numpy
  from pathlib import Path
  import unittest
  from ray.rllib.utils.exploration.exploration import Exploration
  from ray.rllib.utils.framework import try_import_tf, try_import_torch
  from ray.rllib.utils.from_config import from_config
  from ray.rllib.utils.test_utils import check, framework_iterator
label_desc: Use image node_id 3 for calling the DummyComponent obj's underlying member method code with example usage: obj._add_tf(value) and returns: tf