apply(plugin = "biz.aQute.bnd.builder")
  apply(plugin = "io.github.usefulness.maven-sympathy")

  tasks.withType<JavaCompile> {
    options.encoding = Charsets.UTF_8.toString()
  }

  configure<JavaPluginExtension> {
    toolchain {
      languageVersion.set(JavaLanguageVersion.of(17))
    }
  }

  tasks.withType<Checkstyle>().configureEach {
    exclude("**/CipherSuite.java")
  }

plugins {
  kotlin("jvm")
}

val platform = System.getProperty("okhttp.platform", "jdk9")
val testJavaVersion = System.getProperty("test.java.version", "21").toInt()

tasks.withType<Test> {
  useJUnitPlatform()
  onlyIf("By default not in CI") {
    System.getenv("CI") == null
      || (project.hasProperty("containerTests") && project.property("containerTests").toString().toBoolean())
  }

  jvmArgs(
    "-Dokhttp.platform=$platform",

@ElementTypesAreNonnullByDefault
final class Absent<T> extends Optional<T> {
  static final Absent<Object> INSTANCE = new Absent<>();

  @SuppressWarnings("unchecked") // implementation is "fully variant"
  static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override
  public T get() {

   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this method is equivalent to Java 8's
   * {@code Optional.empty}.
   */
  public static <T> Optional<T> absent() {
    return Absent.withType();
  }

  /**
   * Returns an {@code Optional} instance containing the given non-null reference. To have {@code
   * null} treated as {@link #absent}, use {@link #fromNullable} instead.
   *