code: def save_image_data(self, bucket, image_data):
      if bucket in self.available_buckets:
          if image_data.dtype == "bool" or (
              image_data.dtype == "uint8" and 1 in np.unique(image_data)
          ):
              image_data = image_data.astype("uint8") * 255
  
          skimage.io.imsave(f"{bucket}.png", image_data)
  
file_path: SerpentAI/serpent/visual_debugger/visual_debugger.py
imports: from redis import StrictRedis
  import skimage.io
  import numpy
  import pickle
  import itertools
  from serpent.config import config
label_desc: Use image node_id 4 for calling the VisualDebugger obj's underlying member method code with example usage: obj.save_image_data(bucket, image_data) without return types