Checking the Oxford English Dictionary (2nd Ed.), they have accessor only as a form of accessory (as a noun). So yeah, the programming use is "new". fwiw, they

Checking the Oxford English Dictionary (2nd Ed.), they have accessor only as a form of accessory (as a noun). So yeah, the programming use is "new". fwiw, they have "default", in the computing sense of the preselected option, from 1966, while "by default" (in a legal context) has an example from 1764, "Where a defendant makes default, judgement shall be had against him by default."