For implementers, the locking model adds a fair amount of non-trivial internal bookkeeping. Every operation must check lock state, readers must be tracked, and the interplay between locks, cancellation, and error states creates a matrix of edge cases that must all be handled correctly.
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58-летняя Памела Андерсон в ультракоротких шортах снялась для журнала
def save(self, item: Item) - None: