first commit

services/web/frontend/js/features/outline/util/get-children-lines.ts

@@ -0,0 +1,11 @@
+import { OutlineItemData } from '@/features/ide-react/types/outline'
+
+export default function getChildrenLines(
+  children?: OutlineItemData[]
+): number[] {
+  return (children || [])
+    .map(child => {
+      return getChildrenLines(child.children).concat(child.line)
+    })
+    .flat()
+}