it.targetCompatibility = '8'
            }
        }

        then:
        _ * sourceSet.getName() >> 'main'
        1 * sourceSet.getOutput() >> sourceSetOutput
        1 * sourceSetOutput.getGeneratedSourcesDirs() >> Stub(ConfigurableFileCollection)
        1 * sourceSetOutput.getClassesDirs() >> Stub(ConfigurableFileCollection)
        1 * tasks.register("compileMyLang", JavaCompile, _) >> compileTaskProvider

     *
     * @return The generated sources directories. Never returns null.
     * @since 5.2
     */
    FileCollection getGeneratedSourcesDirs();

        }
    }

    @Override
    public FileCollection getDirs() {
        return dirs;
    }

    @Override
    public ConfigurableFileCollection getGeneratedSourcesDirs() {
        return generatedSourcesDirs;
    }

    @Nullable
    public DirectoryContribution getResourcesContribution() {
        return resourcesContributor;
    }

    /**

        sourceSetOutput.getClassesDirs().from(sourceDirectorySet.getDestinationDirectory()).builtBy(compileTask);
        sourceSetOutput.getGeneratedSourcesDirs().from(options.flatMap(CompileOptions::getGeneratedSourceOutputDirectory));
        sourceDirectorySet.compiledBy(compileTask, AbstractCompile::getDestinationDirectory);
    }