code: def __xlower(self):
      n = (self.n,) if not hasattr(self.n, "__len__") else self.n
      xlb = (
          (self.xlb,) if not hasattr(self.xlb, "__len__") else self.xlb
      )
      return list(flatten(i * [k] for i, k in zip(n, xlb)))
  
imports: from mystic.tools import flatten
label_desc: Use image node_id 7 for calling the MeasureBounds obj's underlying member method code with example usage: obj.__xlower() and returns: list