diff --git a/src/DocumentList.php b/src/DocumentList.php
index 6aafba2..02ada88 100644
--- a/src/DocumentList.php
+++ b/src/DocumentList.php
@@ -47,6 +47,7 @@ class DocumentList
     public function items(): Generator
     {
         $debug = defined('PDO_DOC_DEBUG_SQL');
+        if ($debug) echo '*** CALLED GENERATOR ***';
 
         if ($this->result) {
             while ($row = $this->result->fetch(PDO::FETCH_ASSOC)) {