code: def __call__(self, y: float) -> float:
      return np.fabs(y - self._a) / np.fabs(
          np.floor(self._a - y) + self._a
      )
  
imports: from __future__ import annotations
  import abc
  from typing import Callable
  from typing import Union
  import numpy
label_desc: Use image node_id 2 for calling the LinearShiftTransformation obj's underlying member method code with example usage: obj.__call__(y) and returns: unknown