How to use the @inquirer/core/lib/key.isNumberKey function in @inquirer/core

})
        });
      } else if (key.name === 'a') {
        const selectAll = Boolean(choices.find(choice => !choice.checked));
        setState({
          choices: choices.map(choice =>
            Object.assign({}, choice, { checked: selectAll })
          )
        });
      } else if (key.name === 'i') {
        setState({
          choices: choices.map(choice =>
            Object.assign({}, choice, { checked: !choice.checked })
          )
        });
      } else if (isNumberKey(key)) {
        // Adjust index to start at 1
        const position = Number(key.name) - 1;

        // Abort if the choice doesn't exists or if disabled
        if (!choices[position] || choices[position].disabled) {
          return;
        }

        setState({
          cursorPosition: position,
          choices: choices.map((choice, i) => {
            if (i === position) {
              return Object.assign({}, choice, { checked: !choice.checked });
            }

            return choice;

if (isEnterKey(key)) {
      setStatus('done');
      done(choices[cursorPosition].value);
    } else if (isUpKey(key) || isDownKey(key)) {
      let newCursorPosition = cursorPosition;
      const offset = isUpKey(key) ? -1 : 1;
      let selectedOption;

      while (!selectedOption || selectedOption.disabled) {
        newCursorPosition =
          (newCursorPosition + offset + choices.length) % choices.length;
        selectedOption = choices[newCursorPosition];
      }

      setCursorPos(newCursorPosition);
    } else if (isNumberKey(key)) {
      // Adjust index to start at 1
      const newCursorPosition = Number(key.name) - 1;

      // Abort if the choice doesn't exists or if disabled
      if (!choices[newCursorPosition] || choices[newCursorPosition].disabled) {
        return;
      }

      setCursorPos(newCursorPosition);
    }
  });