Add OpticGraph::node getting OpticRef by its Uuid.

src/optic_graph.rs

@@ -6,6 +6,7 @@ use serde::{
     ser::SerializeStruct,
     Deserialize, Serialize,
 };
+use uuid::Uuid;
 
 use crate::optic_ref::OpticRef;
 use crate::{
@@ -106,6 +107,9 @@ impl OpticGraph {
             .edges_directed(target_node, petgraph::Direction::Incoming)
             .any(|e| e.weight().target_port() == target_port)
     }
+    pub fn node(self, uuid: Uuid) -> Option<OpticRef> {
+        self.0.node_weights().find(|node| node.uuid()==uuid).cloned()
+    }
 }
 impl Serialize for OpticGraph {
     fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>