nitc :: MClass :: is_pure_overrider
# pure overriders contain only redefinitions
private fun is_pure_overrider(filter: ModelFilter): Bool do
var news = collect_intro_mproperties(filter).length
var locs = collect_local_mproperties(filter).length
if news == 0 and locs > 0 then return true
return false
end
src/metrics/mendel_metrics.nit:284,2--290,4