function onProviderConstructed view code
Called just before a constructing provider is returned. The listener callback receives the provider that is constructed.
Listener callbacks are expected to be non-yielding and infallible.
Parameters
  
    listener: (provider: Provider) -> ()
   
Fired just before a constructing provider is returned. The listener callback receives the provider that is constructed.
Returns
() -> ()
A callback that when called removes the listener.