The selector for one part of one box, drawn by splitBoxes.
MAIDR's hidden copies of a part carry its attributes too, so they are left out, as they would otherwise match as a second part.
The selector of the box's trace group
The box's position among the group's boxes
Which part
A selector matching that one part
The selector for one part of one box, drawn by splitBoxes.
MAIDR's hidden copies of a part carry its attributes too, so they are left out, as they would otherwise match as a second part.