TopologyVisitor (OpenNMS 2021.1.17 API)

```
public interface TopologyVisitor
```
An interface to allow visiting the different types that may be stored in the topology message's payload.
There should be one visit method here for each of the implementations of OnmsTopologyRef.

All Methods Instance Methods Default Methods
Modifier and Type	Method and Description
`default void`	`visit(OnmsTopologyEdge edge)`
`default void`	`visit(OnmsTopologyPort port)`
`default void`	`visit(OnmsTopologyVertex vertex)`

default void visit(OnmsTopologyVertex vertex)

default void visit(OnmsTopologyPort port)

default void visit(OnmsTopologyEdge edge)

Interface TopologyVisitor