Closes #118 - Adds an exception if the introspected schema does not contain the defined key(s)
Closes #118 - Adds an exception if the introspected schema does not contain the defined key(s)

SensCritique/lithium,qoqa/lithium,UnionOfRAD/lithium,UnionOfRAD/lithium,qoqa/lithium,wbeater/lithium,jails/lithium,jails/lithium,whowgames/lithium,datachand/lithium,mehlah/lithium,muyehub/lithium,pixelcog/lithium,graphis/lithium,graphis/lithium,whowgames/lithium,m4rcsch/lithium-core-library,SensCritique/lithium,wbeater/lithium,davidpersson/lithium,muyehub/lithium,datachand/lithium,mehlah/lithium,m4rcsch/lithium-core-library,pixelcog/lithium,davidpersson/lithium