code: static public String getString(String msg, Object arg1, Object arg2)
  	{
  		return getString(msg, new Object[] { arg1, arg2 });
  	}
docs: Retrieves a message which takes 2 arguments.
  
  @param msg
  String the key to look up.
  @param arg1
  Object an object to insert in the formatted output.
  @param arg2
  Object another object to insert in the formatted output.
  @return String the message for that key in the system message bundle.