Call out signature changes in FilterInterface

Co-authored-by: Frank Brückner <[email protected]> Signed-off-by: George Steel <[email protected]>
laminas · Aug 14, 2024 · c44e8f1 · c44e8f1
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diff --git a/docs/book/v3/migration/v2-to-v3.md b/docs/book/v3/migration/v2-to-v3.md
@@ -31,6 +31,8 @@ final class MyFilter implements Laminas\Filter\FilterInterface {
 }
 ```
 
+#### Change of Parameter and Return Type
+
 Also note that the signature of both `filter()` and `__invoke()` has changed to include `mixed` as both parameter and return type, therefore, it will be necessary to add any missing parameter and return types to your custom filters.
 
 ### Filter Plugin Manager