It's not just Everton I'm talking about though Mike, in general a players contract means nothing. Invariably if a player wants to go they go. Every now then a club keeps a player after they asked for a move and more often than not things go sour.
Occasionally as in the case of Stones and Saurez (must be more but can't think of them) the players continue playing without a fuss,but history tells us they still move on later while under contract.