question

You're right - that's using a per Route Calculation method to return a list of barriers. You can just use something like:

Variant barrier=AStar.navigator.addDynamicBarrier(Vec3(0,0,0),Vec3(1,1,1),Vec3(0,0,0),0);

...where you record the barrier treenode reference(s) in order to remove it (them) later

AStar.navigator.removeDynamicBarrier(barrier)

You're not using the Vec3 constructor before your coordinate parentheses.

By the way you could also use brackets for your coordinates and it will convert automatically to Vec3 - so [1,1,1] would also work.

For that I would create a map. I'm conscious that this your first custom code, but I'd like to set you off with a good method.

The 'barrier' is the thing we need to store for future use - renaming it won't help us much.

Now, you can add a barrier for objects as well as 'abstract' cuboid dimensions as we did in the example above. So when you want to find the barrier that was created, it could be that we have an object as the reference or in the case of the abstract cuboid a name like: "CongestionAreaCuboid1".

A map is like an array but instead of using the numeric position in the array to find the stored value, we use a key which can be almost anything - including objects and strings. To store the barrier in a map with a string key you would use someting like:

Map myBarrierMap;
myBarrierMap["CongestionAreaCuboid1"]=barrier;//  where barrier was returned by addDynamicBarrier();

then to store it on a token:

token.myBarrierMap=myBarrierMap.clone();   //clone may not be necessary

When you want to access it just use:

var barrier=token.myBarrierMap.as(Map)["CongestionAreaCuboid1"];
AStar.navigator.removeDynamicBarrier(barrier);

The map also works for objects:

var barrier=AStar.navigator.addDynamicBarrier(myObject);
myBarrierMap[myObject]=barrier;

and to retrieve:

var barrier=token.myBarrierMap.as(Map)[myObject];

Lastly you might also consider that you can pass an array into addDynamicBarrier (eg. a collection of objects) which will then return an array of barriers. In this case you may want to create a key/barrier value for each of the array entries.