* Implicitly calls {@link #includeInAllJava()}
     * @param compilerConfiguration the configuration of the compile task
     */
    JvmLanguageSourceDirectoryBuilder compiledWithJava(Action<? super JavaCompile> compilerConfiguration);

    /**
     * Includes this source directory in the "allJava" source set
     */
    JvmLanguageSourceDirectoryBuilder includeInAllJava();

            get() >> classesTask
        }

        when:
        jvmLanguageUtilities.registerJvmLanguageSourceDirectory(sourceSet, "mylang") {
            it.withDescription("my test language")
            it.compiledWithJava {
                it.targetCompatibility = '8'
            }
        }

        then:
        _ * sourceSet.getName() >> 'main'
        1 * sourceSet.getOutput() >> sourceSetOutput

            def main = sourceSets.main
            jvm.registerJvmLanguageSourceDirectory(main, "java9") {
                it.withDescription("Java 9 Sources")
                it.compiledWithJava {
                    sourceCompatibility = '9'
                    targetCompatibility = '9'
                    classpath = main.compileClasspath
                }
            }
        """
    }

        this.taskBuilder = taskBuilder;
        return this;
    }

    @Override
    public JvmLanguageSourceDirectoryBuilder compiledWithJava(Action<? super JavaCompile> compilerConfiguration) {
        Function<DirectoryProperty, TaskProvider<? extends AbstractCompile>> t = sourceDirectory ->