Is Nibbana an asankhara?

There are three closely related words in Pali , namely, Sankhara, Sasankhara and asankhara. They are mentioned in the following sutta : ============== “Bad, unskillful qualities, mendicants, arise with conditions, not without conditions. “Sasaṅkhārā, bhikkhave, uppajjanti pāpakā akusalā dhammā, no asaṅkhārā. By giving up those conditions, those bad, unskillful qualities do not occur. ”Tesaṁyeva saṅkhārānaṁ pahānā evaṁ te pāpakā akusalā dhammā na hontī”ti. ========== My question is : Is Nibbana an asankhara?