code: def detect(self, img):
      cnrs = cv2.goodFeaturesToTrack(
          img,
          self.maxCorners,
          self.qualityLevel,
          self.minDistance,
          mask=self.mask,
          blockSize=self.blockSize,
          useHarrisDetector=self.useHarrisDetector,
          k=self.k,
      )
  
      return corners_to_keypoints(cnrs)
  
imports: import cv2
  from .helpers import corners_to_keypoints
label_desc: Use image node_id 2 for calling the GFTT obj's underlying member method code with example usage: obj.detect(img) and returns: corners_to_keypoints