code: def area(self):
      return self.mask.sum()
  
imports: import enum
  from copy import deepcopy
  import numpy
  from skimage import img_as_ubyte
  from skimage.transform import rescale, resize
  from .countless2d import zero_corrected_countless
label_desc: Use image node_id 11 for calling the ObjectMask obj's underlying member method code with example usage: obj.area() and returns: self