/**
* @param string $alias
* @return Expr\Select|null
*/
public function getSelect($alias)
{
$expr = new Expr\Select();
foreach ($this->fits as $fit) {
if ($fit instanceof SelectFitInterface) {
$expr->add($fit->getSelect($alias));
}
}
return $expr->count() != 0 ? $expr : null;
}
