Fix regression

Author: dantleech

src/NamespacedNameTrait.php

@@ -31,7 +31,7 @@ public function getNamespacedName() : ResolvedName {
             return ResolvedName::buildName($this->getNameParts(), $content);
         }
 
-        if ($namespaceDefinition->name !== null) {
+        if ($namespaceDefinition->name instanceof QualifiedName) {
             $resolvedName = ResolvedName::buildName($namespaceDefinition->name->nameParts, $content);
         } else {
             $resolvedName = ResolvedName::buildName([], $content);
@@ -47,4 +47,4 @@ public function getNamespacedName() : ResolvedName {
         }
         return $resolvedName;
     }
-}
+}