var editor: DiskLruCache.Editor? = null
    try {
      editor = snapshot.edit() ?: return // edit() returns null if snapshot is not current.
      entry.writeTo(editor)
      editor.commit()
    } catch (_: IOException) {
      abortQuietly(editor)
    }
  }

  private fun abortQuietly(editor: DiskLruCache.Editor?) {
    // Give up because the cache cannot be written.

    val editor = cache.edit("k1")!!
    editor.setString(0, "A")
    editor.setString(1, "B")
    editor.abort()
    editor.assertInoperable()
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)
  fun explicitRemoveAppliedToDiskImmediately(parameters: Pair<FileSystem, Boolean>) {
    setUp(parameters.first, parameters.second)
    val editor = cache.edit("k1")!!