All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	Needs to be called after the observer is no longer needed.
`void`	`edgeTraversed(Record from, Record to)`
`void`	`estimateComputed(Head head)`
`void`	`finalNodeFound(Record node)`
`void`	`initialNodeCreated(Record node)`
`void`	`nodeVisited(Record node)`
`void`	`stoppedUnreliablyAt(Record rec)`

void edgeTraversed(Record from,
                   Record to)

void initialNodeCreated(Record node)

void stoppedUnreliablyAt(Record rec)

close
```
void close()
```
Needs to be called after the observer is no longer needed. This is independent of the use of the observer and this method is never called from within an ObservableAStarThread

Interface AStarObserver