Function node_rpc::create_light

pub fn create_light<C, P, M, F>(deps: LightDeps<C, F, P>) -> IoHandler<M> where
    C: HeaderBackend<Block>,
    C: Send + Sync + 'static,
    F: Fetcher<Block> + 'static,
    P: TransactionPool + 'static,
    M: Metadata + Default, 

Instantiate all Light RPC extensions.