code: def recursive_include(self, dir, pattern):
          
          full_pattern = os.path.join(dir, '**', pattern)
          found = [f for f in glob(full_pattern, recursive=True)
                   if not os.path.isdir(f)]
          self.extend(found)
          return bool(found)
docs: Include all files anywhere in 'dir/' that match the pattern.