private JavaVersion getDefaultIdeaPluginLanguageLevelForNonJavaProjects() {
        JavaVersion.VERSION_1_6 // see IdeaPlugin#configureIdeaProject(Project)
    }

    private JavaVersion getDefaultIdeaPluginLanguageLevelForJavaProjects() {
        JavaVersion.current() // see IdeaPlugin#configureIdeaProjectForJava(Project)
    }