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use std::fmt::Debug;
use crate::*;
pub trait KvEngine:
Peekable
+ SyncMutable
+ Iterable
+ WriteBatchExt
+ DBOptionsExt
+ CFNamesExt
+ CFOptionsExt
+ ImportExt
+ SstExt
+ TablePropertiesExt
+ CompactExt
+ RangePropertiesExt
+ MvccPropertiesExt
+ TtlPropertiesExt
+ PerfContextExt
+ MiscExt
+ Send
+ Sync
+ Clone
+ Debug
+ Unpin
+ 'static
{
type Snapshot: Snapshot;
fn snapshot(&self) -> Self::Snapshot;
fn sync(&self) -> Result<()>;
fn flush_metrics(&self, _instance: &str) {}
fn reset_statistics(&self) {}
fn bad_downcast<T: 'static>(&self) -> &T;
}