refactor: rename internal data field to __vf

Signed-off-by: Braks <78412429+bcakmakoglu@users.noreply.github.com>

src/workers/parseElements.ts

@@ -13,7 +13,7 @@ export default () =>
       Object.assign(node, {
         id: node.id.toString(),
         type: node.type || 'default',
-        __rf: {
+        __vf: {
           position: clampPosition(node.position, nodeExtent),
           width: undefined,
           height: undefined,
@@ -49,16 +49,16 @@ export default () =>
 
         if (storeNode) {
           const updatedNode: Node = Object.assign(storeNode, element)
-          if (!updatedNode.__rf) updatedNode.__rf = {}
+          if (!updatedNode.__vf) updatedNode.__vf = {}
 
           if (storeNode.position.x !== element.position.x || storeNode.position.y !== element.position.y) {
-            updatedNode.__rf.position = element.position
+            updatedNode.__vf.position = element.position
           }
 
           if (typeof element.type !== 'undefined' && element.type !== storeNode.type) {
             // we reset the elements dimensions here in order to force a re-calculation of the bounds.
             // When the type of a node changes it is possible that the number or positions of handles changes too.
-            updatedNode.__rf.width = undefined
+            updatedNode.__vf.width = undefined
           }
 
           nextElements.nextNodes.push(updatedNode)