(event: ChartGPUEventName, callback: ChartGPUEventCallback)
| 21 | readonly canvas: HTMLCanvasElement; |
| 22 | on(event: ChartGPUEventName, callback: ChartGPUEventCallback): void; |
| 23 | off(event: ChartGPUEventName, callback: ChartGPUEventCallback): void; |
| 24 | updateGridArea(gridArea: GridArea): void; |
| 25 | dispose(): void; |
| 26 | } |