code: public String asString(EnvJAXB env) throws APIException {
  		if(dataAsString!=null) {
  			return dataAsString;
  		} else {
  			return dataAsString = stringifier.stringify(env, dataAsObject);
  		}
  	}
docs: Respond with the String if it exists, or marshal the String and pass the result back.<p>
  
  Explicitly use a specific Env for logging purposes
  
  @param env
  @return String
  @throws APIException