val compilation = kotlin.targets["jvm"].compilations["main"]
  val compileKotlinTask = compilation.compileTaskProvider.get() as KotlinJvmCompile
  val targetDir = compileKotlinTask.destinationDirectory.dir("../java9")
  val sourceDir = file("src/jvmMain/java9/")

  // Use a Java 11 compiler for the module info.
  javaCompiler.set(project.javaToolchains.compilerFor { languageVersion.set(JavaLanguageVersion.of(11)) })

                <arg>-XDignore.symbol.file</arg>
              </compilerArgs>
            </configuration>
          </execution>
          <execution>
            <id>compile-java9</id>
            <phase>compile</phase>
            <goals>
              <goal>compile</goal>
            </goals>
            <configuration>
              <release>9</release>
              <compileSourceRoots>

       */
      @SuppressWarnings("NewApi")
      @Override
      String typeName(Type type) {
        return type.getTypeName();
      }
    },
    JAVA9 {
      @Override
      Type newArrayType(Type componentType) {
        return JAVA8.newArrayType(componentType);
      }

      @Override
      Type usedInGenericType(Type type) {

                <arg>-XDignore.symbol.file</arg>
              </compilerArgs>
            </configuration>
          </execution>
          <execution>
            <id>compile-java9</id>
            <phase>compile</phase>
            <goals>
              <goal>compile</goal>
            </goals>
            <configuration>
              <release>9</release>

                <arg>-sourcepath</arg>
                <arg>doesnotexist</arg>
              </compilerArgs>
            </configuration>
          </execution>
          <execution>
            <id>compile-java9</id>
            <goals>
              <goal>compile</goal>
            </goals>
            <configuration>
              <release>9</release>
              <compileSourceRoots>

                <arg>-XDignore.symbol.file</arg>
              </compilerArgs>
            </configuration>
          </execution>
          <execution>
            <id>compile-java9</id>
            <phase>compile</phase>
            <goals>
              <goal>compile</goal>
            </goals>
            <configuration>
              <release>9</release>

       */
      @IgnoreJRERequirement
      @SuppressWarnings("NewApi")
      @Override
      String typeName(Type type) {
        return type.getTypeName();
      }
    },
    JAVA9 {
      @Override
      Type newArrayType(Type componentType) {
        return JAVA8.newArrayType(componentType);
      }

      @Override
      Type usedInGenericType(Type type) {

    environment("OKHTTP_ROOT", rootDir)
  }
  tasks.withType<KotlinJvmTest>().configureEach {
    environment("OKHTTP_ROOT", rootDir)
  }

  tasks.withType<JavaCompile> {
    if (name.contains("Java9")) {
      sourceCompatibility = "9"
      targetCompatibility = "9"
    } else {
      sourceCompatibility = projectJavaVersion.toString()
      targetCompatibility = projectJavaVersion.toString()
    }
  }