code: def save_figure_to_numpy(fig):
      # save it to a numpy array.
      data = np.fromstring(
          fig.canvas.tostring_rgb(), dtype=np.uint8, sep=""
      )
      data = data.reshape(fig.canvas.get_width_height()[::-1] + (3,))
      return data
  
imports: from enum import Enum
  from typing import Optional, Tuple
  import librosa
  import matplotlib.pylab
  import numpy
  import torch
  from einops import rearrange
  from numba import jit, prange
  from nemo.collections.tts.torch.tts_data_types import DATA_STR2DATA_CLASS, MAIN_DATA_TYPES, WithLens
  from nemo.utils import logging
  from nemo.utils.decorators import deprecated
label_desc: Use image node_id 21 for calling a global function with example usage: save_figure_to_numpy(fig) and returns: data