renderer.renderRawSinglePage(reports, new ReportRenderer<Collection<Report>, HtmlPageBuilder<Writer>>() {
            @Override
            public void render(Collection<Report> model, HtmlPageBuilder<Writer> builder) {
                generate(builder);
            }
        }, outputFile);
    }

    private void generate(final HtmlPageBuilder<Writer> builder) {

Class <org.gradle.reporting.CodePanelRenderer> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (CodePanelRenderer.java:0)
Class <org.gradle.reporting.HtmlPageBuilder> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (HtmlPageBuilder.java:0)
Class <org.gradle.reporting.HtmlReportBuilder> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (HtmlReportBuilder.java:0)