OptionalderiveSet to false when the detected dialect's E values cannot be read as
filament lengths, so per-path dimensions must not be derived from the
moves. Absent means derive, which is the default for every dialect
(see Job.deriveMoveDimensions)
OptionalextrusionExtrusion dimension changes from ;WIDTH: / ;HEIGHT: comments, in line order
OptionalfilamentFilament diameter in millimeters announced by header comments, when known
OptionallayerOptionalslicer
Everything the parser picked up about the file itself, as opposed to its movements