private void setAllSoundsButtonsEnabled(boolean enabled) {
   enableSoundCheckBox.setSelected(enabled);
   enableGunshotCheckBox.setSelected(enabled);
   enableBulletHitCheckBox.setSelected(enabled);
   enableRobotDeathCheckBox.setSelected(enabled);
   enableWallCollisionCheckBox.setSelected(enabled);
   enableRobotCollisionCheckBox.setSelected(enabled);
 }