redef fun collect_metrics(h) do
		var mclass_metrics = h.mclasses_metrics
		mclass_metrics.collect(new HashSet[MClass].from([self]))

		var metrics = new JsonObject
		metrics["mclass"] = mclass_metrics
		return metrics
	end

	redef fun collect_metrics(h) do
		var mclasses = new HashSet[MClass]
		for mgroup in self.mgroups do
			for mmodule in mgroup.mmodules do mclasses.add_all mmodule.intro_mclasses
		end

		var mclasses_metrics = h.mclasses_metrics
		mclasses_metrics.collect(new HashSet[MClass].from(mclasses))

		var mmodules = new HashSet[MModule]
		for mgroup in self.mgroups do
			mmodules.add_all mgroup.mmodules
		end

		var mmodules_metrics = h.mmodules_metrics
		mmodules_metrics.collect(new HashSet[MModule].from(mmodules))

		var metrics = new JsonObject
		metrics["mclasses"] = mclasses_metrics
		metrics["mmodules"] = mmodules_metrics
		return metrics
	end

	redef fun collect_metrics(h) do
		var mclasses = new HashSet[MClass]
		for mmodule in self.mmodules do mclasses.add_all mmodule.intro_mclasses

		var mclasses_metrics = h.mclasses_metrics
		mclasses_metrics.collect(new HashSet[MClass].from(mclasses))

		var mmodules_metrics = h.mmodules_metrics
		mmodules_metrics.collect(new HashSet[MModule].from(mmodules))

		var metrics = new JsonObject
		metrics["mclasses"] = mclasses_metrics
		metrics["mmodules"] = mmodules_metrics
		return metrics
	end

	redef fun collect_metrics(h) do
		var mclasses_metrics = h.mclasses_metrics
		mclasses_metrics.collect(new HashSet[MClass].from(intro_mclasses))

		var mmodule_metrics = h.mmodules_metrics
		mmodule_metrics.collect(new HashSet[MModule].from([self]))

		var metrics = new JsonObject
		metrics["mclasses"] = mclasses_metrics
		metrics["mmodule"] = mmodule_metrics
		return metrics
	end