/**
* @return boolean
*/
function show()
{
if (!isset($this->_show)) {
if (!$this->argument->isValid()) {
$this->_show = false;
}
if ($this->_value === '\'\'') {
$this->_show = false;
}
if (!isset($this->_show)) {
return parent::show();
}
}
return $this->_show;
}
