code: def __call__(
      self, x: np.ndarray, y: np.ndarray, infer_sigma: bool = False
  ) -> np.ndarray:
      kmatrix = self.kernel(x, y, infer_sigma)
      return 1.0 - kmatrix
  
file_path: alibi/alibi/utils/kernel.py
imports: import numpy
  from typing import Union, Optional
  from alibi.utils.distance import squared_pairwise_distance
label_desc: Use image node_id 2 for calling the GaussianRBFDistance obj's underlying member method code with example usage: obj.__call__(x, y, infer_sigma) and returns: unknown