using Vendor from composer

system/vendor/mpdf/psr-log-aware-trait/src/MpdfPsrLogAwareTrait.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Mpdf\PsrLogAwareTrait;
+
+use Psr\Log\LoggerInterface;
+
+trait MpdfPsrLogAwareTrait
+{
+
+	/**
+	 * @var \Psr\Log\LoggerInterface
+	 */
+	protected $logger;
+
+	public function setLogger(LoggerInterface $logger)
+	{
+		$this->logger = $logger;
+		if (property_exists($this, 'services') && is_array($this->services)) {
+			foreach ($this->services as $name) {
+				if ($this->$name && $this->$name instanceof \Psr\Log\LoggerAwareInterface) {
+					$this->$name->setLogger($logger);
+				}
+			}
+		}
+	}
+
+}