public function not(Expr $subexpression)
    {
        $not = new Condition\Logical\Not;
        $not->add($subexpression->condition);

        return $this;
    }
public function not(Expr $subexpression)
    {
        $not = new Condition\Logical\Not;
        $not->add($subexpression->condition);

        return $this;
    }
public function not ( Expr $ subexpression ) { $ not = new Condition \ Logical \ Not ; $ not -> add ( $ subexpression -> condition ) ; return $ this ; }
Add a NOT clause to the expression.

@see QueryBuilder::not()

@param Expr $subexpression

@return QueryBuilder|$this
Add a NOT clause to the expression .