public DialogButton setIcons(UiIcon primary, UiIcon secondary)
	{
		options.put("icons", new ButtonIcon(primary, secondary));
		return this;
	}
public DialogButton setIcons ( UiIcon primary , UiIcon secondary ) { options . put ( "icons" , new ButtonIcon ( primary , secondary ) ) ; return this ; }
* Icons to display, with or without text (see text option). The primary icon is
displayed on the left of the label text, the secondary on the right. Value for the
primary and secondary properties must be a classname (String), eg. "ui-icon-gear".
For using only a primary icon: icons: {primary:'ui-icon-locked'}. For using both
primary and secondary icon: icons:
{primary:'ui-icon-gear',secondary:'ui-icon-triangle-1-s'}

@param primary
The primary icon (should be non-null)
@param secondary
The secondary icon (might be null).
@return the button