public function addItem(array $item, $first=false, $createGroup=false)
	{
		$this->addItemToTarget($this->arrButtons, $item, $first, $createGroup);
	}
public function addItem(array $item, $first=false, $createGroup=false)
	{
		$this->addItemToTarget($this->arrButtons, $item, $first, $createGroup);
	}
public function addItem ( array $ item , $ first = false , $ createGroup = false ) { $ this -> addItemToTarget ( $ this -> arrButtons , $ item , $ first , $ createGroup ) ; }
add item to button component
@param array $item
@param bool  $first
@param bool  $createGroup
add item to button component