Function sc_service::client::new_with_backend

pub fn new_with_backend<B, E, Block, G, RA>(
    backend: Arc<B>,
    executor: E,
    genesis_block_builder: G,
    spawn_handle: Box<dyn SpawnNamed>,
    prometheus_registry: Option<Registry>,
    telemetry: Option<TelemetryHandle>,
    config: ClientConfig<Block>
) -> Result<Client<B, LocalCallExecutor<Block, B, E>, Block, RA>>where
    E: CodeExecutor + RuntimeVersionOf,
    G: BuildGenesisBlock<Block, BlockImportOperation = <B as Backend<Block>>::BlockImportOperation>,
    Block: BlockT,
    B: LocalBackend<Block> + 'static,

Create a client with the explicitly provided backend. This is useful for testing backend implementations.