type FullBackend = TFullBackend<OpaqueBlock>;
struct FullBackend {
pub(crate) storage: Arc<StorageDb<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>>,
pub(crate) offchain_storage: LocalStorage,
pub(crate) blockchain: BlockchainDb<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>,
pub(crate) canonicalization_delay: u64,
pub(crate) import_lock: Arc<RwLock<RawRwLock, ()>>,
pub(crate) is_archive: bool,
pub(crate) blocks_pruning: BlocksPruning,
pub(crate) io_stats: FrozenForDuration<(IoStats, UsageInfo)>,
pub(crate) state_usage: Arc<StateUsageStats>,
pub(crate) genesis_state: RwLock<RawRwLock, Option<Arc<DbGenesisStorage<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>>>>,
pub(crate) shared_trie_cache: Option<SharedTrieCache<BlakeTwo256>>,
}