def METHOD_NAME(self, left_vecs: Tensor, right_vecs: Tensor) -> Tuple[Optional[Tensor], ...]:
    """
    Use default behavior, but KeOps does not automatically make args contiguous like torch.matmul.
    This is necessary for variational GP models.
    """
    return super().METHOD_NAME(left_vecs.contiguous(), right_vecs.contiguous())