code: def open_region(self, region):
      thickness = np.copy(self.thickness)
      # if thickness % 2 == 0:
      #     thickness += 1
      return opening(region, np.ones((thickness, thickness)))
  
imports: from rle import *
  from commonfunctions import *
  from staff import calculate_thickness_spacing, remove_staff_lines
label_desc: Use image node_id 2 for calling the Segmenter obj's underlying member method code with example usage: obj.open_region(region) and returns: opening