To create a StreetLinkFence, you call the StreetLinkFence constructor with the LatLon for a point on that street. For example:
LatLon coord = new LatLon(34, -118);
StreetLinkFence fence = new StreetLinkFence(coord);
This will create a street link fence for a section of S Athel Dr, CA.
The bounding box property is intended for read-only access.