True when --cache was passed explicitly. Gates persistence: when false,
all runs cache-free (scan into memory, render, write nothing to disk);
when true, it persists to cachePath like scan + render.
OptionalconcentrateOptionaledgeOptionalengineOptionalgraphOptionalgraphOptionalissueOptionalnodeOptionalnodesepDisconnected-component 2D packing mode; defaults to 'node' (shelf packing).
OptionalprOptionalranksepMax pixel dimension on the longer axis for png/jpeg raster output.
Optionalsplines
Parsed
allinvocation — carries every scan and render field.