FileEnumerator.closeFinish

Finishes closing a file enumerator, started from [gio.file_enumerator.FileEnumerator.closeAsync].

If the file enumerator was already closed when [gio.file_enumerator.FileEnumerator.closeAsync] was called, then this function will report [gio.types.IOErrorEnum.Closed] in error, and return false. If the file enumerator had pending operation when the close operation was started, then this function will report [gio.types.IOErrorEnum.Pending], and return false. If cancellable was not null, then the operation may have been cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error [gio.types.IOErrorEnum.Cancelled] will be set, and false will be returned.