subflow can take js objects or url

bzGraflow.js

@@ -230,14 +230,18 @@ class BZgraflow extends Buildoz{
         // scaled down so it fits exactly inside the clicked node, then animate it to full size.
         const nodeBB = nodeEl.getBoundingClientRect()
         const parentBB = this.getBoundingClientRect()
-
         const flowNode = this.flow?.nodes?.find(n => n.id === id)
-        const flowUrl = flowNode.subflow.url
 
         const childEl = document.createElement('bz-graflow')
         childEl.isSubflow = true
         childEl.currentOrientation = this.currentOrientation
-        childEl.setAttribute('flow', flowUrl)
+        if(flowNode.subflow.url) childEl.setAttribute('flow', flowNode.subflow.url)
+        else {
+            childEl.addEventListener('bz:graflow:domConnected', (e) => {
+                e.detail.graflow.loadFlow(flowNode.subflow.flow)
+            })
+        }
+
         childEl.setAttribute('tension', this.getBZAttribute('tension') || '60')
         // Remember which node we "came from" so exitSubflow() can animate back to it.
         childEl.dataset.enterNodeId = id