code: def serialize(tensor: "Tensor") -> str:
      tensor = tensor.squeeze(0).numpy()
      print(tensor.shape)
      image = PILImage.fromarray(tensor)
      buffer = BytesIO()
      image.save(buffer, format="PNG")
      buffer.seek(0)
      encoded = buffer.getvalue()
      return base64.b64encode(encoded).decode("ascii")
  
file_path: pytorch-lightning/src/lightning/app/components/serve/types/image.py
imports: import base64
  from io import BytesIO
  from lightning.app.components.serve.types.type import BaseType
  from lightning.app.utilities.imports import _is_pil_available, _is_torch_available
label_desc: Use image node_id 2 for calling the Image obj's underlying member method code with example usage: obj.serialize(tensor) and returns: base64