private void enableJSONParserFeature(JsonParser jp) {
    jp.enable(Feature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER);
    jp.enable(Feature.ALLOW_UNQUOTED_FIELD_NAMES);
  }
Converts a JSON document (String or Byte Array) into a PdxInstance

@param json The JSON document (String or Byte Array) to convert to PDX
@param identityFields Any desired identity fields on the JSON object to be used for equals and
       hashCode computations
@return The PdxInstance
@throws JSONFormatterException if unable to create the PdxInstance
geode-core/src/main/java/org/apache/geode/pdx/JSONFormatter.java