code: def _get_filesystem_config(file_types):
      
      out = "     filesystems {\n"
      for file_type in sorted(list(file_types)):
          if file_type in _FILESYSTEM_CONFIG:
              out += _FILESYSTEM_CONFIG[file_type]
      out += "      }\n"
      return out
docs: Retrieve filesystem configuration, including support for specified file types.