class_docstr: An `Instance` represents one data point that we're evaluating on (e.g., one
  question in a QA task).
  Note: `eq=False` means that we hash by the identity.
docstr: Return all correct references.
docstr_tok: ["Return","all","correct","references","."]
code: def all_correct_references(self) -> List[Reference]:
      """Return all correct references."""
      return [
          reference
          for reference in self.references
          if reference.is_correct
      ]
  
imports: from abc import ABC, abstractmethod
  from dataclasses import dataclass, field, replace
  from typing import List, Optional, Tuple
  import re
  import inspect
  from helm.common.object_spec import ObjectSpec, create_object
  from helm.common.general import format_text, format_split, format_tags, indent_lines
  from helm.benchmark.augmentations.perturbation_description import PerturbationDescription
label_desc: Use image node_id 2 for calling the Instance obj's underlying member method code with example usage: obj.all_correct_references() and returns: unknown