ReadonlyidID of the cell this end attaches to.
ReadonlymagnetThe SVG magnet node the end attaches to, or null when attaching to the cell's root.
ReadonlymodelThe cell model (element or link) this end attaches to.
ReadonlyportID of the port the end attaches to, or null when it attaches to the cell body.
ReadonlyselectorValue of the magnet's joint-selector attribute, or null when it has none.
One end (source or target) of a link: the cell it attaches to and the exact port or magnet within that cell. Shared by ValidateConnectionParams and emitted on
link:connect/link:disconnectevents, so validation and event payloads describe a connection the same way.