Function raftstore::store::do_snapshot

pub fn do_snapshot<E>(
    mgr: SnapManager, 
    engine: &E, 
    kv_snap: E::Snapshot, 
    region_id: u64, 
    last_applied_index_term: u64, 
    last_applied_state: RaftApplyState, 
    for_balance: bool
) -> Result<Snapshot> where
    E: KvEngine,