From eda52a893fe55ba3329b5da7922c491858694e9e Mon Sep 17 00:00:00 2001
From: Rob Lourens <roblourens@gmail.com>
Date: Wed, 7 Jun 2017 17:24:47 -0700
Subject: [PATCH] Fix error from calling ltrim on null variableName

---
 src/DefinitionResolver.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/DefinitionResolver.php b/src/DefinitionResolver.php
index b8ddc59..098220b 100644
--- a/src/DefinitionResolver.php
+++ b/src/DefinitionResolver.php
@@ -1177,12 +1177,12 @@ class DefinitionResolver
 
     /**
      * @param DocBlock | null $docBlock
-     * @param $variableName
+     * @param string | null $variableName
      * @return DocBlock\Tags\Param | null
      */
     private function tryGetDocBlockTagForParameter($docBlock, $variableName)
     {
-        if ($docBlock === null) {
+        if ($docBlock === null || $variableName === null) {
             return null;
         }
         $tags = $docBlock->getTagsByName('param');