Method insert

flow-rs/src/registry.rs:58–64

(&self, id: Q, elem: T)

    }

    pub(crate) fn insert<Q>(&self, id: Q, elem: T)
    where
        Q: Into<ID>,
    {
        let mut registry = self.inner.write().unwrap();
        registry.elems.insert(id.into(), Arc::new(elem));
    }

    pub(crate) fn for_each<F>(&self, f: F)
    where