* @brief A wrapper around `CheckedReadPage` that unwraps the inner value if it exists. * * If `CheckedReadPage` returns a `std::nullopt`, **this function aborts the entire process.** * * This function should **only** be used for testing and ergonomic's sake. If it is at all possible that the buffer pool * manager might run out of memory, then use `CheckedPageWrite` to allow you to handle that
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