Add strict comparison null !== instead of ! (#1794)

Author: jderusse

CHANGELOG.md

@@ -8,6 +8,7 @@
 
 ### Changed
 
+- use strict comparison `null !==` instead of `!`
 - AWS enhancement: Documentation updates.
 
 ## 2.6.0

src/Result/ListFunctionsResponse.php

@@ -71,7 +71,7 @@ public function getFunctions(bool $currentPageOnly = false): iterable
         $page = $this;
         while (true) {
             $page->initialize();
-            if ($page->nextMarker) {
+            if (null !== $page->nextMarker) {
                 $input->setMarker($page->nextMarker);
 
                 $this->registerPrefetch($nextPage = $client->listFunctions($input));

src/Result/ListLayerVersionsResponse.php

@@ -65,7 +65,7 @@ public function getLayerVersions(bool $currentPageOnly = false): iterable
         $page = $this;
         while (true) {
             $page->initialize();
-            if ($page->nextMarker) {
+            if (null !== $page->nextMarker) {
                 $input->setMarker($page->nextMarker);
 
                 $this->registerPrefetch($nextPage = $client->listLayerVersions($input));

src/Result/ListVersionsByFunctionResponse.php

@@ -86,7 +86,7 @@ public function getVersions(bool $currentPageOnly = false): iterable
         $page = $this;
         while (true) {
             $page->initialize();
-            if ($page->nextMarker) {
+            if (null !== $page->nextMarker) {
                 $input->setMarker($page->nextMarker);
 
                 $this->registerPrefetch($nextPage = $client->listVersionsByFunction($input));