code: def prepare_config_and_inputs_for_common(self):
      config_and_inputs = self.prepare_config_and_inputs()
      config, input_values, attention_mask = config_and_inputs
      inputs_dict = {
          "input_values": input_values,
          "attention_mask": attention_mask,
      }
      return config, inputs_dict
  
imports: import inspect
  import math
  import multiprocessing
  import os
  import traceback
  import unittest
  import numpy
  from datasets import load_dataset
  from transformers import Wav2Vec2Config, is_flax_available
  from transformers.testing_utils import CaptureLogger, is_flaky, is_librosa_available, is_pt_flax_cross_test, is_pyctcdecode_available, require_flax, require_librosa, require_pyctcdecode, require_soundfile, run_test_in_subprocess, slow
  from ...test_modeling_flax_common import FlaxModelTesterMixin, floats_tensor, random_attention_mask
label_desc: Use image node_id 3 for calling the FlaxWav2Vec2ModelTester obj's underlying member method code with example usage: obj.prepare_config_and_inputs_for_common() and returns: config,  inputs_dict