refactor(inrernals): use one prop for all internals

src/container/EdgeRenderer/utils.ts

@@ -13,7 +13,7 @@ import {
   Transform,
   XYPosition,
 } from '../../types';
-import { handleBoundsSymbol, rectToBox } from '../../utils';
+import { internalsSymbol, rectToBox } from '../../utils';
 
 export type CreateEdgeTypes = (edgeTypes: EdgeTypes) => EdgeTypesWrapped;
 
@@ -168,7 +168,7 @@ export function isEdgeVisible({
 
 export function getNodeData(nodeInternals: NodeInternals, nodeId: string): [Rect, NodeHandleBounds | null, boolean] {
   const node = nodeInternals.get(nodeId);
-  const handleBounds = node?.[handleBoundsSymbol] || null;
+  const handleBounds = node?.[internalsSymbol].handleBounds || null;
 
   const isInvalid =
     !node ||

src/container/NodeRenderer/index.tsx

@@ -11,7 +11,7 @@ import {
   ReactFlowState,
   WrapNodeProps,
 } from '../../types';
-import { isParentSymbol, zSymbol } from '../../utils';
+import { internalsSymbol } from '../../utils';
 
 interface NodeRendererProps {
   nodeTypes: NodeTypesWrapped;
@@ -118,8 +118,8 @@ const NodeRenderer = (props: NodeRendererProps) => {
             isConnectable={isConnectable}
             resizeObserver={resizeObserver}
             dragHandle={node.dragHandle}
-            zIndex={node[zSymbol] ?? 0}
-            isParent={!!node[isParentSymbol]}
+            zIndex={node[internalsSymbol].z ?? 0}
+            isParent={!!node[internalsSymbol].isParent}
             noDragClassName={props.noDragClassName}
             noPanClassName={props.noPanClassName}
           />