Fix edge-case with anonymous class

Author: ondrejmirtes

src/Reflection/BetterReflection/SourceLocator/CachingVisitor.php

@@ -32,7 +32,11 @@ public function enterNode(\PhpParser\Node $node): ?int
 
 		if ($node instanceof \PhpParser\Node\Stmt\ClassLike) {
 			if ($node->name !== null) {
-				$this->classNodes[strtolower($node->namespacedName->toString())][] = new FetchedNode(
+				$fullClassName = $node->name->toString();
+				if ($this->currentNamespaceNode !== null && $this->currentNamespaceNode->name !== null) {
+					$fullClassName = $this->currentNamespaceNode->name . '\\' . $fullClassName;
+				}
+				$this->classNodes[strtolower($fullClassName)][] = new FetchedNode(
 					$node,
 					$this->currentNamespaceNode,
 					$this->fileName