Parameters
- node
 - port
 - the 
FrameworkElementrepresenting a port on the node - spot
 - a Spot value describing where the link should connect
 - from
 - true if the link is coming out of the port; false if going to the port
 - ortho
 - whether the link should have orthogonal segments
 - othernode
 - the node at the other end of the link
 - otherport
 - the FrameworkElement port at the other end of the link