.orEmpty()
      .filter { f -> f.isFile }
      .toList()
  }
}

internal class MainTestProvider : SimpleProvider() {
  override fun arguments(): List<Any> {
    val mainFiles = mainFiles()
    return mainFiles
      .map {
        val suffix = it.path.replace("${prefix}samples/guide/src/main/java/", "")
        suffix
          .replace("(.*)\\.java".toRegex()) { mr ->