Synthetic boundary-port id for a body edge end. Body edges (no declared
sourcePort/targetPort) get one of these on each end so ELK distributes the
attachment along the node side and the renderer draws a distinct,
orthogonal connection per edge instead of stacking them at one point.
Synthetic boundary-port id for a body edge end. Body edges (no declared sourcePort/targetPort) get one of these on each end so ELK distributes the attachment along the node side and the renderer draws a distinct, orthogonal connection per edge instead of stacking them at one point.