pub fn resource_lookup(key: &str) -> Option<Arc<dyn Any + Send + Sync>>Expand description
Look up an already-attached resource’s accessor payload by fingerprint
key through the installed RESOURCE_ACCESSOR.
Returns None when no accessor is installed (no host) or when no live
entry matches key. Consuming nodes downcast the returned
Arc<dyn Any + Send + Sync> to their concrete handle type.