diff --git a/src/utils.ts b/src/utils.ts
index 33afafd..1b15d98 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,5 +1,11 @@
-function isNodeSimple(node) {
+import { FiberNode, FiberNodeisHTMLLike } from './mocked-types';
+
+function isHtmlLike(node: FiberNode): node is FiberNodeisHTMLLike {
     return (typeof node.type === "string") || node.type === null;
 }
 
-export { isNodeSimple };
\ No newline at end of file
+function isNotHtmlLike(node: FiberNode): node is Exclude<FiberNode, FiberNodeisHTMLLike> {
+    return (typeof node.type === "string") || node.type === null;
+}
+
+export { isHtmlLike, isNotHtmlLike };
\ No newline at end of file