Meanings of have a deathbed in English

Thus, at the age of eighty-four, I didn't have a deathbed vision that took me back forty years to try to save my son.

They had a deathbed one once so footman William could marry kitchen maid Daisy.

Interestingly, in the run-up to the election, the Government has now had a deathbed conversion to the notion of a constitutional provision on child protection.