nitc :: MClass :: is_pure_replacer
# pure replacers never call to super in its redefinitions
private fun is_pure_replacer(filter: ModelFilter): Bool do
var spcs = extended_mproperties(filter).length
var rdfs = collect_redef_mproperties(filter).length
if spcs == 0 and rdfs > 0 then return true
return false
end
src/metrics/mendel_metrics.nit:335,2--341,4