code: def _find_configs(self):
          
          if self.config_files is not None:
              return self.config_files
  
          # Walk the whole project tree and look for "config.rb" files
          result = []
          for path, _, files in os.walk(self.app.root_path):
              if "config.rb" in files:
                  result.append(os.path.join(path, "config.rb"))
          return result
docs: Scans the project directory for config files or returns
          the explicitly specified list of files.