In insertExtra method, the "allowedExtras" property was never defined. Now it is a static member of Backend Model class.
In insertExtra method, the "allowedExtras" property was never defined. Now it is a static member of Backend Model class.

DegradationOfMankind/forkcms,forkcms/forkcms,vytsci/forkcms,nosnickid/forkcms,vytsci/forkcms,matthiasmullie/forkcms,forkcms/forkcms,ikoene/forkcms,ikoene/forkcms,sumocoders/forkcms,Thijzer/forkcms,wengyulin/forkcms,dmoerman/forkcms,tommyvdv/forkcms,carakas/forkcms,tommyvdv/forkcms,vytsci/forkcms,mathiashelin/forkcms,vytenizs/forkcms,bartdc/forkcms,mathiashelin/forkcms,jessedobbelaere/forkcms,jacob-v-dam/forkcms,matthiasmullie/forkcms,justcarakas/forkcms,DegradationOfMankind/forkcms,jeroendesloovere/forkcms,justcarakas/forkcms,jonasdekeukelaere/forkcms,jonasdekeukelaere/forkcms,sumocoders/forkcms,dmoerman/forkcms,jessedobbelaere/forkcms,jacob-v-dam/forkcms,wengyulin/forkcms,jonasdekeukelaere/forkcms,mathiashelin/forkcms,jeroendesloovere/forkcms,Saxithon/gh-pages,Katrienvh/forkcms,nosnickid/forkcms,carakas/forkcms,mathiashelin/forkcms,vytenizs/forkcms,vytenizs/forkcms,wengyulin/forkcms,carakas/forkcms,riadvice/forkcms,tommyvdv/forkcms,jessedobbelaere/forkcms,sumocoders/forkcms,Katrienvh/forkcms,forkcms/forkcms,jessedobbelaere/forkcms,riadvice/forkcms,jonasdekeukelaere/forkcms,riadvice/forkcms,Katrienvh/forkcms,Thijzer/forkcms,jacob-v-dam/forkcms,jeroendesloovere/forkcms,DegradationOfMankind/forkcms,sumocoders/forkcms,Saxithon/gh-pages,nosnickid/forkcms,tommyvdv/forkcms,jonasdekeukelaere/forkcms,justcarakas/forkcms,sumocoders/forkcms,dmoerman/forkcms,ikoene/forkcms,bartdc/forkcms,Thijzer/forkcms,jacob-v-dam/forkcms,matthiasmullie/forkcms,carakas/forkcms,forkcms/forkcms,bartdc/forkcms,Katrienvh/forkcms,carakas/forkcms,jeroendesloovere/forkcms,DegradationOfMankind/forkcms,riadvice/forkcms