/**
* Decrement a column's value by a given amount.
*
* @param string $column
* @param int $amount
* @param array $extra
* @return int
*/
public function decrement($column, $amount = 1, array $extra = array())
{
$extra = $this->addUpdatedAtColumn($extra);
return $this->query->decrement($column, $amount, $extra);
}
