can-save-file?

Called just before the editor is saved to a file. If the return value is #f, the file is not saved. See also on-save-file and after-save-file.

• (send an-editor can-save-file? filename format) -> boolean
      filename : string
      format : symbol in '(guess standard text text-force-cr same copy)

  The filename argument is the name the file will be saved to. See load-file for information about format.