class_docstr: Module that calculates Shi-Tomasi corners.
  
  .. image:: _static/img/gftt_response.png
  
  See :func:`~kornia.feature.gftt_response` for details.
code: def __repr__(self) -> str:
      return f"{self.__class__.__name__}(grads_mode={self.grads_mode})"
  
imports: from typing import Optional, Union
  import torch
  from kornia.core import Module, Tensor, tensor
  from kornia.core.check import KORNIA_CHECK_SHAPE
  from kornia.filters import gaussian_blur2d, spatial_gradient
label_desc: Use image node_id 2 for calling the CornerGFTT obj's underlying member method code with example usage: obj.__repr__() and returns: self, str, self, str