/// A byte count.
////// A thin newtype over `u64` so pool settings like `page_size` are
/// unambiguously in bytes at the type level.
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]pubstructMemorySize(pub u64);implMemorySize{/// The size in bytes.
pubconstfnbytes(self)->u64{self.0}}