code: @Override
      public String stringify(Object o) throws JSONMarshallException {
          try {
              return mapper.writeValueAsString(o);
          } catch (JsonMappingException e) {
              throw new JSONMarshallException("Unable to parse non-well-formed content", e);
          } catch (JsonGenerationException e) {
              throw new JSONMarshallException("Error during JSON writing", e);
          } catch (IOException e) {
              throw new JSONMarshallException("I/O exception of some sort has occurred", e);
          }
      }
docs: {@inheritDoc}