Function solana_ledger::blockstore::find_slot_meta_in_db_else_create

fn find_slot_meta_in_db_else_create(
    db: &Database,
    slot: Slot,
    insert_map: &mut HashMap<u64, Rc<RefCell<SlotMeta>>>
) -> Result<Rc<RefCell<SlotMeta>>>

A helper function to find_slot_meta_else_create that searches the SlotMeta based on the specified slot in db and updates insert_map.

If the specified db does not contain a matched entry, then it will create a dummy orphan slot in the database.