Function polkadot_node_subsystem::dummy::dummy_overseer_builder

pub fn dummy_overseer_builder<Spawner, SupportsParachains, 'a>(
    spawner: Spawner,
    supports_parachains: SupportsParachains,
    registry: Option<&'a Registry>
) -> Result<OverseerBuilder<Init<SpawnGlue<Spawner>>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<DummySubsystem>, Init<HashMap<H256, Vec<Sender<Result<(), SubsystemError>>, Global>, RandomState>>, Init<HashMap<H256, Arc<Span>, RandomState>>, Init<Vec<(H256, u32), Global>>, Init<HashMap<H256, u32, RandomState>>, Init<SupportsParachains>, Init<LruCache<H256, (), RandomState>>, Init<Metrics>>, SubsystemError>where
    SpawnGlue<Spawner>: 'static + Spawner,
    SupportsParachains: HeadSupportsParachains,

Create an overseer with all subsystem being Sub.

Preferred way of initializing a dummy overseer for subsystem tests.