Michael Gratton authored Jul 17, 2020 and Michael Gratton committed Aug 18, 2020

Publicly, get objects for a variant rather than from it since we're
not actually getting the objects from the variant, just looking them
up using the variant as an id.

Internally, use `to_` rather than `get_` when converting between plugin
and engine objects, since its typically just a cast or a lookup to do
so.