public static ObjectMapper create()
   {
      return new FactoryOptions(Option.FIELD_ACCESS, Option.VALUES_UTF8)
         .option(Option.COLLECTION_CLASS, ArrayList.class)
         .create();
   }
Create a default ObjectMapper.  The default ObjectMapper implementation uses
field access, ASCII members, and UTF-8 values.  If you <i>know</i> that your
values are always ASCII instead of UTF-8 it is strongly recommended to
configure a custom ObjectMapper using the {@link #option(Option...)} method.

@return an ObjectMapper with default options
src/main/java/com/zaxxer/hikari/json/JsonFactory.java