How to use the inquirer/lib/objects/choices.prototype function in inquirer

this.currentChoices.getChoice = choiceIndex => {
                let choice = Choices.prototype.getChoice.call(
                    this.currentChoices,
                    choiceIndex
                );
                return {
                    value: stripAnsi(choice.value),
                    name: stripAnsi(choice.name),
                    short: stripAnsi(choice.name)
                };
            };
        });

this.currentChoices.getChoice = (choiceIndex) => {
        const choice = Choices.prototype.getChoice.call(this.currentChoices, choiceIndex);
        return {
          value: stripAnsi(choice.value),
          name: stripAnsi(choice.name),
          short: stripAnsi(choice.name),
        };
      };
    });