class_docstr: Loader that extracts text from images
code: def unload_model(self):
      if hasattr(self._pix2struct_model, "cpu"):
          self._pix2struct_model.cpu()
          clear_torch_cache()
  
file_path: h2ogpt/src/image_pix2struct.py
imports: from typing import List, Union, Any, Tuple
  from langchain.docstore.document import Document
  from langchain.document_loaders import ImageCaptionLoader
  from utils import get_device, clear_torch_cache
  from PIL import Image
label_desc: Use image node_id 4 for calling the H2OPix2StructLoader obj's underlying member method code with example usage: obj.unload_model() without return types