The eventArgs.getRow() returns reference to GridRow where button is displayed.
The eventArgs.getButton() returns reference to html element which represents delete button.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2