diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index 46f1a462c..f32988096 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -80,6 +80,7 @@ export const toTypeString = (value: unknown): string =>
   objectToString.call(value)
 
 export const toRawType = (value: unknown): string => {
+  // extract "RawType" from strings like "[object RawType]"
   return toTypeString(value).slice(8, -1)
 }