missing 'use' statements in Search examples

developer_manual/digging_deeper/search.rst

@@ -187,7 +187,9 @@ Next, you'll see a dummy provider that returns a static set of results.
     use OCP\IURLGenerator;
     use OCP\IUser;
     use OCP\Search\IProvider;
+    use OCP\Search\SearchResult;
     use OCP\Search\SearchResultEntry;
+    use OCP\Search\ISearchQuery;
 
     class Provider implements IProvider {
 
@@ -279,6 +281,7 @@ For **offset-based pagination** you return ``$query->getLimit()`` results and sp
     use OCP\IUser;
     use OCP\Search\IProvider;
     use OCP\Search\SearchResult;
+    use OCP\Search\ISearchQuery;
 
     class Provider implements IProvider {
 
@@ -346,6 +349,7 @@ For a **cursor-based pagination** a app-specific property is used to know a refe
     use OCP\IUser;
     use OCP\Search\IProvider;
     use OCP\Search\SearchResult;
+    use OCP\Search\ISearchQuery;
 
     class Provider implements IProvider {