<!-- Public documentation export; not library implementation source. -->
# WatermarkContentProvider

[Integration guide](https://docs.lumencharts.com/charting-library/reference/compatibility) · [Reference index](https://docs.lumencharts.com/charting-library/api/)

Public contract reference. This declaration describes types and callback shapes; availability is constrained by the linked integration guide and the runtime capability. Legacy product-specific fields are not a promise of implementation.

```ts
export type WatermarkContentProvider = (
  data: WatermarkContentData,
) => WatermarkLine[] | null;
```

## Related types

- [WatermarkContentData](https://docs.lumencharts.com/charting-library/api/WatermarkContentData)
- [WatermarkLine](https://docs.lumencharts.com/charting-library/api/WatermarkLine)

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Documentation page: https://docs.lumencharts.com/charting-library/api/WatermarkContentProvider