What does 2 Kings 22:20 mean?

So I’ll let you die in peace and be buried before any of this disaster happens. You won’t have to see all the trouble I’m bringing on this place.' They took this message back to the king. 2 Kings 22:20 - Modern Text Bible

(God promises Josiah that he’ll die before the coming judgment falls, sparing him from witnessing the destruction. The messengers return to Josiah with this answer.)