pub fn follow_point_edit(
base: &Value,
after: &mut Value,
) -> Result<Vec<PinPointChange>, String>Expand description
The user edited the CONNECTION POINTS (a point renamed, added or deleted):
carry the change between base and after to the pins and pads of after.
The two sides are symmetric: a point’s name is its identity exactly as a
pin’s label is, so this runs the same positional diff the other way, one
group against one unit’s pins. A renamed point relabels the pin base
paired with it, a point that is gone removes its pin, and a point this edit
brought gets a pin below the others unless a pin of that unit already
carries its name. Pads follow a rename.
Err holds the edit (see the module docs) and leaves after untouched.