override fun create() = FileSystem.SYSTEM

      override val windows: Boolean
        get() = TestUtil.windows
    },

    FakeUnix {
      override fun create() = FakeFileSystem().apply { emulateUnix() }

      override val windows: Boolean
        get() = false
    },

    FakeWindows {
      override fun create() = FakeFileSystem().apply { emulateWindows() }