safetorun_verify.kt

  fun saveFile(fileName: String, content: String) {
      val file = File("/data/is/safe/to/go/here", fileName)
      val isSafe = file
          .verifyFile(this) {
              File("/data/is/safe/to/go/here").allowDirectory()
          }

      if (isSafe) { // Without this check - what would happen? Bad things..
          file.writeText(content)
      }
  }

saveFile("../../../not/safe/to/go/here", "contents-of-malware")