Add signature for implementations of RecursiveIterator

Change-Id: I767fe31444167cbe08ef6900abc60c635c005cd0

2 files changed, 5 insertions, 5 deletions

diff --git a/includes/libs/iterators/NotRecursiveIterator.php b/includes/libs/iterators/NotRecursiveIterator.php
index 22ff7e7bd4ba..a3e1e56cc660 100644
--- a/includes/libs/iterators/NotRecursiveIterator.php
+++ b/includes/libs/iterators/NotRecursiveIterator.php
@@ -25,11 +25,11 @@
  * @ingroup Maintenance
  */
 class NotRecursiveIterator extends IteratorDecorator implements RecursiveIterator {
-	public function hasChildren() {
+	public function hasChildren(): bool {
 		return false;
 	}
 
-	public function getChildren() {
+	public function getChildren(): ?RecursiveIterator {
 		// @phan-suppress-next-line PhanTypeMismatchReturnProbablyReal False positive
 		return null;
 	}
diff --git a/includes/utils/BatchRowIterator.php b/includes/utils/BatchRowIterator.php
index 74c0e340cbcf..02b205e490b4 100644
--- a/includes/utils/BatchRowIterator.php
+++ b/includes/utils/BatchRowIterator.php
@@ -216,14 +216,14 @@ class BatchRowIterator implements RecursiveIterator {
 	/**
 	 * @return bool True when this result set has rows
 	 */
-	public function hasChildren() {
+	public function hasChildren(): bool {
 		return $this->current && count( $this->current );
 	}
 
 	/**
-	 * @return RecursiveIterator
+	 * @return null|RecursiveIterator
 	 */
-	public function getChildren() {
+	public function getChildren(): ?RecursiveIterator {
 		return new NotRecursiveIterator( new ArrayIterator( $this->current ) );
 	}