Changed the fieldInfo and primaryKeyFieldName dictionaries to be immutable.
Changed the fieldInfo and primaryKeyFieldName dictionaries to be immutable.

Threadflip/FCModel,lonelyplanet/FCModel,iosphere/FCModel,bartekhugo/FCModel,marcoarment/FCModel,macressler/FCModel,lynns/FCModel,marcoarment/FCModel,mirion/FCModel