Mechanism for calculating negative resulting XIRR values

[superKalo]

For my use case, I want to track the XIRR of an investment, which is losing funds. So imagine something like investing 100, but ending with 10. Or with a code example:

const flows = [
    {
      amount: 100,
      date: new Date('2019-02-02'),
    },
    {
      amount: -10,
      date: new Date('2019-03-02'),
    },
  ];

  try {
    console.log('XIRR:', xirr(flows), 'of', flows);
  } catch (err) {
    console.log(err);
  }

So for this use case, the XIRR should be a negative number, because one is actually losing funds.

Is there a way to do that with this lib?