C.1 Ablationstudy Ablation study results are provided in Table 3.

We propose to learn a mapping from node data to the graph structure based on the idea of learning to optimise (L2O).

Inthese methods, for an input, an explanation is in the form of a contrast point differing in very few features from the original input and lying inadifferent class. Otherworks tryto build globally interpretable models likedecision trees and rule lists based onthe datausing actual labels orbased ontheblack-box models predictions.