can-load-file? (augments, and augmentable only) in mode:host-text-mixin

Called just before the editor is loaded from a file. If the return value is #f, the file is not loaded. See also on-load-file and after-load-file.

• (send a-mode:host-text-mixin can-load-file? orig super-call filename format ???
     orig : ???
     super-call : (??? -> ???)
     filename : ??
     format : ??

  If a surrogate is set, calls the surrogate with the arguments it was passed, plus this and a function that calls the super method.

  if a surrogate is not set, calls the super method and returns that result.