func getOperationRootType( schema typs.QLSchema, operation *lang.OperationDefinition, ) *typs.QLObject { switch operation.Operation { case lang.OperationQuery: return schema.GetQueryType() case lang.OperationMutation: murationType := schema.GetMutationType() if murationType == nil { panic(lang.NewQLError( "Schema is not configured for mutations", []lang.INode{operation})) } return murationType default: panic(lang.NewQLError( "Can only execute queries and mutation", []lang.INode{operation})) } }