The scale operation can be used with subelements, vertices
and edges, but in this case this only works with polylines
(wires) because internally the functions `scaleVertex`
and `scaleEdges` only work with polylines that have a `Points`
property.
When doing a copy and scale, it also calls `copyScaledEdges`
which calls `joinWires`, so problems with joining wires
may also be present when performing this operation.
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