pub trait ServerOperation {
// Required methods
fn quit(&mut self) -> MemCachedResult<()>;
fn flush(&mut self, expiration: u32) -> MemCachedResult<()>;
fn noop(&mut self) -> MemCachedResult<()>;
fn version(&mut self) -> MemCachedResult<Version>;
fn stat(&mut self) -> MemCachedResult<BTreeMap<String, String>>;
}