installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/lib/Azure/GuzzleHttp/Psr7/NoSeekStream.php

@@ -0,0 +1,22 @@
+<?php
+namespace GuzzleHttp\Psr7;
+
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Stream decorator that prevents a stream from being seeked
+ */
+class NoSeekStream implements StreamInterface
+{
+    use StreamDecoratorTrait;
+
+    public function seek($offset, $whence = SEEK_SET)
+    {
+        throw new \RuntimeException('Cannot seek a NoSeekStream');
+    }
+
+    public function isSeekable()
+    {
+        return false;
+    }
+}