code: public function build(array $nodes, ClassMetadata $classMetadata)
      {
          $class = null;
          foreach ($this->nodeFetcher->foreachNodes($nodes) as $nodeData) {
              $node = $nodeData['node'];
              if ($node instanceof Stmt\UseUse) {
                  $classMetadata->addUse($node);
                  $classMetadata->addClasses($this->reservedWordReplacer->replace(implode('\\', $node->name->parts)));
                  if ($node->name->getLast() !== $node->alias) {
                      $classMetadata->addClassesAlias(
                          $node->alias,
                          $this->reservedWordReplacer->replace(implode('\\', $node->name->parts))
                      );
                  }
              } elseif ($node instanceof Stmt\Namespace_) {
                  $classMetadata->setNamespace(implode('\\', $node->name->parts));
              } elseif ($node instanceof Stmt\Interface_ || $node instanceof Stmt\Class_) {
                  if ($class !== null) {
                      throw new \Exception('Multiple class find in '.$fileName);
                  }
                  $class = $this->reservedWordReplacer->replace($node->name);
                  $classMetadata->setClass($class);
  
                  if ($node instanceof Stmt\Interface_ ) {
                  	
                  } elseif ($node instanceof Stmt\Class_ && $node->implements !== null) {
                      $implementsClean = array();
                      foreach ($node->implements as $implement) {
                          $implementsClean[] = $this->reservedWordReplacer->replace(implode('\\', $implement->parts));
                      }
                      $classMetadata->setImplements($implementsClean);
                  }
              } elseif ($node instanceof Stmt\Interface_ || $node instanceof Stmt\Class_) {
                  if ($class !== null) {
                      throw new \Exception('Multiple class find in '.$fileName);
                  }
                  $class = $this->reservedWordReplacer->replace($node->name);
                  $classMetadata->setClass($class);
              }
          }
  
          return $classMetadata;
      }
docs: @param array         $nodes
  @param ClassMetadata $classMetadata
  
  @return ClassMetadata