code: def windowed(self: DcmDataset, w, l):
      return self.scaled_px.windowed(w, l)
  
imports: from __future__ import annotations
  from ..basics import *
  from ..vision.all import *
  from ..data.transforms import *
  import pydicom, kornia, skimage
  from pydicom.dataset import Dataset
  from pydicom.tag import BaseTag
  from pydicom.multival import MultiValue
  from PIL import Image
label_desc: Use image node_id 12 for calling a global function with example usage: windowed(w, l) and returns: self