register<TEvent> method
Registers the handler
to a given TEvent
.
Implementation
void register<TEvent>(EventHandler<TEvent> handler) {
final handlers = _getHandlersFor<TEvent>();
assert(
!handlers.contains(handler),
'register<$TEvent> was called with an already registered handler',
);
// When the store is being modified, create a new copy.
_handlers[TEvent] = <EventHandler<TEvent>>{
...handlers,
handler,
};
}