Returns the compact calculation and display record attached when a
hyperspectaculR plot was created. Later arbitrary ggplot modifications may
change the visible plot without updating this original-rendering record.
Ordinary + ggplot2::theme() and + ggplot2::labs() additions preserve it.
Inspect individual component plots before assembling a patchwork; a combined
patchwork has no single calculation record. Full actual band selections,
endpoints, fallback reasons, exclusions and quantity definitions remain
inspectable even when plot labels abbreviate them. Source cubes and arbitrary
input metadata are not retained in the record.