## GroupFill class

Represents this fill format should inherit the fill properties of the group.

```javascript
class GroupFill;
```


## Methods

| Method | Description |
| --- | --- |
| [isNull()](#isNull--)| Checks whether the implementation object is null. |


### isNull() {#isNull--}

Checks whether the implementation object is null.

```javascript
isNull() : boolean;
```