expect
Start tracking the provided target object, with the expectation that it should be eligible for automatic garbage collection soon, i.e. stop being strongly reachable soon. If target stays strongly reachable, target will be considered retained. The time at which target is considered retained is determined by the DeletableObjectReporter implementation.
Parameters
target
an object expected to not be strongly reachable soon.
reason
reason why the passed in object should be deleted. For example, "MyPresenter received the destroy() callback".