Should the observer.operationDidFinish be called after state = .finished

[bmkor]

PSOperations/PSOperations/Operation.swift

Lines 350 to 354 in 69b5905

	for observer in observers {
	observer.operationDidFinish(self, errors: internalErrors)
	}
	state = .finished

Just wondering if the state = .finished should be before the for observer in observers ....
The reasons are

• the description says operationDidFinish;
• the execution code in the operationDidFinish may assume the operation is finished; for example, its operationqueue will not contain the operation if it is marked as finished.

[jjatie]

Are you proposing an operationWillFinish method? Changes to this behaviour would break many observers in my code, and I imagine many others'.