code: public Object execEval(String arg) {
  		try {
  			return scriptEngine.eval("eval(" + arg + ")");
  		} catch (ScriptException e) {
  			throw new BundlingProcessException("Error while evaluating a script", e);
  		}
  	}
docs: Launch eval function on the argument given in parameter
  
  @param arg
  the argument
  @return the evaluated object