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pub trait FlushLimit { /// Max number of bytes accessed between flush calls. const FLUSH_LIMIT: u32; } impl FlushLimit for Vec<u8> { const FLUSH_LIMIT: u32 = i32::MAX as u32; } impl<T: FlushLimit + ?Sized> FlushLimit for &mut T { const FLUSH_LIMIT: u32 = T::FLUSH_LIMIT; }