message: refactor(edges): source and target node must be initialized
diff: @@ -77,7 +77,8 @@ const Edge = ({
  return null;
  }
  - if (!sourceNode.__rf.width || !sourceNode.__rf.height) {
  + // source and target node need to be initialized
  + if (!sourceNode.__rf.width || !targetNode.__rf.width) {
  return null;
  }
  