A pie and a funnel each draw exactly one per datum -- measured: three
slices are three filled paths, and the three unfilled ones beside them are
the label guides, which the paint filter already declines.
A gauge draws two for its one datum, the track and the progress arc, so
there is no arrangement in which its count and its marks agree and it is
not counted at all -- which is also why gaugeLayer names neither.
How many filled marks one of these series drew.
A pie and a funnel each draw exactly one per datum -- measured: three slices are three filled paths, and the three unfilled ones beside them are the label guides, which the paint filter already declines.
A gauge draws two for its one datum, the track and the progress arc, so there is no arrangement in which its count and its marks agree and it is not counted at all -- which is also why gaugeLayer names neither.