Method clone

flow-rs/src/registry.rs:96–103

(&self)

    ID: Clone,
{
    fn clone(&self) -> Self {
        let inner = self.inner.read().unwrap();
        Registry {
            inner: RwLock::new(RegistryInner {
                elems: inner.elems.clone(),
            }),
        }
    }
}

type GlobalCallback = RwLock<Vec<Box<dyn Fn(u64) + Send + Sync>>>;