if (entry.currentEditor != this) {
          return blackholeSink()
        }
        if (!entry.readable) {
          written!![index] = true
        }
        val dirtyFile = entry.dirtyFiles[index]
        val sink: Sink
        try {
          sink = fileSystem.sink(dirtyFile)
        } catch (_: FileNotFoundException) {
          return blackholeSink()
        }
        return FaultHidingSink(sink) {