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

if (isEnterKey(key)) {
      const answer = value || defaultValue || '';
      setStatus('loading');
      const isValid = await config.validate(answer);
      if (isValid === true) {
        setValue(answer);
        setStatus('done');
        done(answer);
      } else {
        // TODO: Can we keep the value after validation failure?
        // `rl.line = value` works but it looses the cursor position.
        setValue('');
        setError(isValid || 'You must provide a valid value');
        setStatus('pending');
      }
    } else if (isBackspaceKey(key) && !value) {
      setDefaultValue(undefined);
    } else {
      setValue(rl.line);
      setError(undefined);
    }
  });