public static ObjectMapper getMapperIgnoringUnknownProperties() {
    ObjectMapper mapper = getMapper();
    mapper.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);
    return mapper;
  }
@return a jackson json mapper that allows single quotes and is able to deserialize json
        string without @JsonTypeInfo if base class is a concrete implementation.
geode-common/src/main/java/org/apache/geode/util/internal/GeodeJsonMapper.java