private void checkUnboundVersions(BuildPlan buildPlan) {
            String defaulModelId = DefaultLifecycleRegistry.DEFAULT_LIFECYCLE_MODELID;
            List<String> unversionedPlugins = buildPlan
                    .allSteps()
                    .flatMap(step -> step.mojos.values().stream().flatMap(map -> map.values().stream()))
                    .map(MojoExecution::getPlugin)
                    .filter(p -> p.getLocation("version") != null