docs: boolean isAssignableKey(Method getter) {
          synchronized (autoGeneratedKeyGetterCache) {
              if ( !autoGeneratedKeyGetterCache.containsKey(getter) ) {
                  autoGeneratedKeyGetterCache.put(
                          getter,
                          ReflectionUtils.getterOrFieldHasAnnotation(getter, DynamoDBAutoGeneratedKey.class)
                                  && ( ReflectionUtils.getterOrFieldHasAnnotation(getter, DynamoDBHashKey.class) ||
                                       ReflectionUtils.getterOrFieldHasAnnotation(getter, DynamoDBRangeKey.class) ||
                                       ReflectionUtils.getterOrFieldHasAnnotation(getter, DynamoDBIndexHashKey.class) ||
                                       ReflectionUtils.getterOrFieldHasAnnotation(getter, DynamoDBIndexRangeKey.class)));
              }
              return autoGeneratedKeyGetterCache.get(getter);
          }
      }