/** * Add a $nor clause to the current query. * * You can create a new expression using the {@link Builder::expr()} method. * * @see Expr::addNor() * @see http://docs.mongodb.org/manual/reference/operator/nor/ * @param array|Expr $expression * @return self */ public function addNor($expression) { $this->expr->addNor($expression); return $this; }