customized method for deep link handler

the deeplinkdispatch is a good library and I was used it in my project. in my case , I want to do something before intent submit via startactivity, but I have find no method for my case. I have to return a intent immediate. eg. I want to request data from network and start different activity with network data.
can this library support this case on next plan.

```
@WebLink("/site/page")
public static void linkAppPage(Content aContent,Bundle aExtras){
//do something here
//request data any where
request.callback(){ data ->
if (data is caseA){
startactivity(A)
}else{
startactivity(B)
}
}
}
```

Review the existing @WebLink deep-link handling path and how it invokes startActivity. Determine how a custom handler could support asynchronous network results and route to activities A or B, then define the API behavior and tests needed for that flow.

Written by the indexing model from the issue text.