def spec2 = Mock(ClassLoaderSpec)
        def settings1 = daemonForkOptionsBuilder()
            .withClassLoaderStructure(new HierarchicalClassLoaderStructure(spec1).withChild(spec2))
            .keepAliveMode(KeepAliveMode.SESSION)
            .build()
        def settings2 = daemonForkOptionsBuilder()
            .withClassLoaderStructure(new HierarchicalClassLoaderStructure(spec1).withChild(spec2))
            .keepAliveMode(KeepAliveMode.SESSION)

        return new DaemonForkOptionsBuilder(forkOptionsFactory)
            .javaForkOptions(javaForkOptions)
            .withClassLoaderStructure(classLoaderStructure)
            .keepAliveMode(KeepAliveMode.DAEMON)
            .build();
    }

    public static class JavaCompilerParameters extends CompilerWorkerExecutor.CompilerParameters {

        return new DaemonForkOptionsBuilder(forkOptionsFactory)
            .javaForkOptions(javaForkOptions)
            .withClassLoaderStructure(classLoaderStructure)
            .keepAliveMode(KeepAliveMode.valueOf(compileOptions.getKeepAliveMode().name()))
            .build();
    }

    private FilteringClassLoader.Spec getScalaFilterSpec() {

    public DaemonForkOptionsBuilder javaForkOptions(JavaForkOptions javaForkOptions) {
        javaForkOptions.copyTo(this.javaForkOptions);
        return this;
    }

    public DaemonForkOptionsBuilder withClassLoaderStructure(ClassLoaderStructure classLoaderStructure) {
        this.classLoaderStructure = classLoaderStructure;
        return this;
    }

    public DaemonForkOptions build() {

        return new DaemonForkOptionsBuilder(forkOptionsFactory)
            .javaForkOptions(javaForkOptions)
            .keepAliveMode(KeepAliveMode.SESSION)
            .withClassLoaderStructure(classLoaderStructure)
            .build();
    }

    private static FilteringClassLoader.Spec getMinimalGradleFilter() {
        // Allow only certain things from the underlying classloader

            builder.javaForkOptions(forkOptions)
                .withClassLoaderStructure(classLoaderStructureProvider.getWorkerProcessClassLoaderStructure(isolatedFromChanges.getAsFiles(), getParamClasses(executionClass, parameters)));