original_string: private function buildLevelsString($levels)
      {
          $this->levelsString = join(DIRECTORY_SEPARATOR, array_fill(0, $levels, '%s')) . DIRECTORY_SEPARATOR;
  
          return $this;
      }
code: private function buildLevelsString($levels)
      {
          $this->levelsString = join(DIRECTORY_SEPARATOR, array_fill(0, $levels, '%s')) . DIRECTORY_SEPARATOR;
  
          return $this;
      }
code_tokens: private function buildLevelsString ( $ levels ) { $ this -> levelsString = join ( DIRECTORY_SEPARATOR , array_fill ( 0 , $ levels , '%s' ) ) . DIRECTORY_SEPARATOR ; return $ this ; }
docstring: Builds a string with placeholders and directory separators required to
  create a path for saving a final cache entry.
  
  For example if $levels = 3 and DIRECTORY_SEPARATOR = '/':
  %s/%s/%s/
  
  @param int $levels
  @return $this
docstring_tokens: Builds a string with placeholders and directory separators required to create a path for saving a final cache entry .