/** * Returns the second portion of a date as a number between 0 and 59, but * can be 60 to account for leap seconds. * * The argument can be any expression as long as it resolves to a date. * * @see http://docs.mongodb.org/manual/reference/operator/aggregation/second/ * @see Expr::second * @param mixed|Expr $expression * @return self */ public function second($expression) { $this->expr->second($expression); return $this; }