code: def plot_mask(mask, title="Mask"):
      mask = mask.numpy()
      figure, axis = plt.subplots(1, 1)
      img = axis.imshow(
          mask, cmap="viridis", origin="lower", aspect="auto"
      )
      axis.set_title(title)
      plt.colorbar(img, ax=axis)
  
file_path: audio/examples/tutorials/mvdr_tutorial.py
imports: import torch
  import torchaudio
  import torchaudio.functional
  import matplotlib.pyplot
  import mir_eval
  from IPython.display import Audio
  from pesq import pesq
  from pystoi import stoi
  from torchaudio.utils import download_asset
label_desc: Use image node_id 2 for calling a global function with example usage: plot_mask(mask, title) without return types