code: def get_config(self):
      return {
          "factor": self.factor,
          "dense": self.dense,
          "activation": self.activation,
      }
  
imports: import json
  import numpy
  import pytest
  import keras
  from keras import ops
  from keras import testing
  from keras.saving import serialization_lib
label_desc: Use image node_id 3 for calling the NestedCustomLayer obj's underlying member method code with example usage: obj.get_config() and returns: dict