code: def check_for_upload_create(self, relative_path=None):
          
          for f in os.listdir(
              path_join(
                  self.local_path, relative_path) if relative_path else self.local_path
          ):
              self.node_check_for_upload_create(relative_path, f)
docs: Traverse the relative_path tree and check for files that need to be uploaded/created.
  
          Relativity here refers to the shared directory tree.