onEvent method

void onEvent(AsyncResult<InT> prev, AsyncResult<InT> next)

A life-cycle method invoked when CustomProviderListenable.source. changes after the initial event.

It will not be called with the initial value.

• self represents the this object of the ProviderTransformer2. It offers a convenient way to call ProviderTransformer2.state.

Implementation

void onEvent(AsyncResult<InT> prev, AsyncResult<InT> next) {}