observeModules
Observe observables from all Module instances of type T.
The transform is provided with a list of all currently available Modules, and should return an Observable that emits values based on the provided list of Modules.
The stream completes once the Tealium instance fails to initialize or is shut down.
Return
A Subscribable for the inner Observable.
Parameters
transform
: The transformation that maps the list of Modules to an Observable.