public function setLayout($layoutName)
    {
        $this->_layout = empty($layoutName) ? null : $layoutName.$this->_suffix;
    }
public function setLayout($layoutName)
    {
        $this->_layout = empty($layoutName) ? null : $layoutName.$this->_suffix;
    }
public function setLayout ( $ layoutName ) { $ this -> _layout = empty ( $ layoutName ) ? null : $ layoutName . $ this -> _suffix ; }
set the default layout name.

@param string|null $layoutName layout name
set the default layout name .