code: def __call__(self, in_str):
      if not self.strip:
          return in_str
  
      if self.strip_pos == "left":
          return in_str.lstrip(self.strip_str)
      elif self.strip_pos == "right":
          return in_str.rstrip(self.strip_str)
      else:
          return in_str.strip(self.strip_str)
  
label_desc: Use image node_id 2 for calling the StringStripper obj's underlying member method code with example usage: obj.__call__(in_str) and returns: in_str, in_str, in_str, in_str