The newest payload version this build reads. Tracks the model version, since
the body is a drawings document: version 1 carried 1.9.x drawings,
version 2 carries the split text and levelled fibs, and version 3 adds the
interval range a drawing is shown on. A payload is written as the lowest
version that holds it, so a copy with no range still pastes into a build
that reads only version 2, which refuses anything newer.
The newest payload version this build reads. Tracks the model version, since the body is a drawings document: version 1 carried 1.9.x drawings, version 2 carries the split text and levelled fibs, and version 3 adds the interval range a drawing is shown on. A payload is written as the lowest version that holds it, so a copy with no range still pastes into a build that reads only version 2, which refuses anything newer.