# Method Git.Export()->feature()

Method feature

  `void feature(string feature, string|void arg)`

Description

  Require that the backend for the stream supports a certian feature.

Parameter `feature`

  Feature to require support for. Typically one of:

  `"date-format"` | Same as the corresponding command-line option.
  `"export-marks"`
  `"relative-marks"`
  `"no-relative-marks"`
  `"force"`
  `"import-marks"`
  `"import-marks-if-exists"`
  `"cat-blob"` | Require the cat_blob and ls commands to be supported.
  `"ls"`
  `"notes"` | Require that the backend supports the notemodify subcommand.
  `"done"` | Require the stream to terminate with a done command.