1: UI works, receiving location updates

model/Node.js

@@ -0,0 +1,10 @@
+export default function Node(node) {
+    let traits = [
+        "labels"
+    ]
+    for(let i = 0; i < traits.length; i++) {
+        if(!node[traits[i]]) {
+            throw new Error(`Node is missing field "${traits[i]}": ${JSON.stringify(node)}`)
+        }
+    }
+}