docstr: Create instances from the dataset which include two classes only.
docstr_tok: ["Create","instances","from","the","dataset","which","include","two","classes","only","."]
code: def get_instances(self, n: int = 45) -> list[str]:
      """Create instances from the dataset which include two classes only."""
      return [
          f"{classA}-{classB}"
          for classA, classB in itertools.combinations(
              self._data.target_names, 2
          )
      ][:n]
  
file_path: SMAC3/tests/fixtures/datasets.py
imports: from __future__ import annotations
  from abc import abstractmethod
  import itertools
  import numpy
  import pytest
  from sklearn import datasets
label_desc: Use image node_id 2 for calling the DigitsDataset obj's underlying member method code with example usage: obj.get_instances(n) and returns: unknown