deploy: 63c10a51fc

api/operator_ltlt.md

@@ -51,6 +51,8 @@ Linear.
     `#!cpp std::ostream& operator>>(const basic_json& j, std::ostream& o)` which has been deprecated in version 3.0.0.
     It will be removed in version 4.0.0. Please replace calls like `#!cpp j >> o;` with `#!cpp o << j;`.
 
+    See the [migration guide](../integration/migration_guide.md#miscellaneous-functions) for how to update existing code.
+
 ## Examples
 
 ??? example "Example: (1) serialize JSON value to stream"