pub fn single_sync_value_from<T>(
node: &Node<T>,
) -> Result<T, SyncValueFromError>where
T: Clone + 'static,Expand description
Read exactly one DATA value from a synchronously completing source.
The helper returns SyncValueFromError::Pending if the node does not
complete during the synchronous subscribe/current-drain window. It is not a
Promise/Future analogue and owns no runtime.