Type Alias DescribeSink 

pub type DescribeSink = Rc<dyn Fn(&GraphDescribeOutput)>;

Sink type for reactive describe. D272 (2026-05-21): single-owner- thread shape — Rc<dyn Fn> matches D248’s !Send + !Sync Core. The assert_not_impl_any! below locks D248 intent at the type system.

Aliased Type

pub struct DescribeSink { /* private fields */ }