'RLMException', reason: 'Only 'object' properties can be made optional, and property 'name' is of type 'string'.'
`First throw call stack:
(
0 CoreFoundation 0x0000000102e01c65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010496cbb7 objc_exception_throw + 45
2 Realm 0x00000001024f2fb6 +[RLMObjectSchema schemaForObjectClass:] + 5846
3 Realm 0x000000010257bcb6 +[RLMSchema initialize] + 1862
4 libobjc.A.dylib 0x000000010496d4d6 _class_initialize + 648
5 libobjc.A.dylib 0x00000001049766e1 lookUpImpOrForward + 351
6 libobjc.A.dylib 0x00000001049830d3 objc_msgSend + 211
7 Realm 0x0000000102555770 +[RLMRealm realmWithPath:key:readOnly:inMemory:dynamic:schema:error:] + 4800
8 Realm 0x0000000102554178 +[RLMRealm realmWithPath:readOnly:error:] + 152
9 … realm ×1