Is "repayment of long-term debt" already counted in "Net Income"?

I know the debt interest payment is included in net income? How about repayment of long-term debt? According to the solution of Q24 sample exam 2, it seems that repayment of long-term debt is also included in net income.

If it’s an early retirement of long-term debt, there might be a gain or loss to it, which will affect NI.