Index: pkg/lookup_map/README.md |
diff --git a/pkg/lookup_map/README.md b/pkg/lookup_map/README.md |
index 73f5a81519a9f4c461b1a44607a87726cef7c790..ecab6b56964bc792d41d38ec0bcae002bcefca4d 100644 |
--- a/pkg/lookup_map/README.md |
+++ b/pkg/lookup_map/README.md |
@@ -14,6 +14,8 @@ const expression that can only be created with a const constructor. This means |
that primitives, Strings, and constant objects that override the `==` operator |
cannot be tree-shaken. |
+**Note**: this feature is currently experimental in dart2js, we recommend trying |
+other alternatives before relying on this feature. |
## Examples |