pub(super) fn open(engine: &Arc<Engine>, name: &str) -> Arc<ColumnFamily> ⓘExpand description
Acquires a stable column-family handle for a map.
The returned handle erases the engine-borrow lifetime carried by RocksDB.
Its caller must retain the engine until after the handle is dropped, which
Map guarantees by field ownership.
§Panics
Panics if the column family was not described before the engine opened.