"DocBlock" -> add "getTagsWithTypeByName()"

-> because I saw errors like this ```Call to undefined method phpDocumentor\Reflection\DocBlock\Tags\InvalidTag::getType()```

-> https://github.com/Roave/BetterReflection/blob/5b4d1c53768e2a3bc32ab348752663733fd70546/src/TypesFinder/FindReturnType.php#L53

src/DocBlock.php

@@ -14,6 +14,7 @@ declare(strict_types=1);
 namespace phpDocumentor\Reflection;
 
 use phpDocumentor\Reflection\DocBlock\Tag;
+use phpDocumentor\Reflection\DocBlock\Tags\TagWithType;
 use Webmozart\Assert\Assert;
 
 final class DocBlock
@@ -161,6 +162,27 @@ final class DocBlock
         return $result;
     }
 
+    /**
+     * Returns an array of tags with type matching the given name. If no tags are found
+     * an empty array is returned.
+     *
+     * @param string $name String to search by.
+     *
+     * @return TagWithType[]
+     */
+    public function getTagsWithTypeByName(string $name) : array
+    {
+        $result = [];
+
+        foreach ($this->getTagsByName($name) as $tag) {
+            if ($tag instanceof TagWithType) {
+                $result[] = $tag;
+            }
+        }
+
+        return $result;
+    }
+
     /**
      * Checks if a tag of a certain type is present in this DocBlock.
      *