Inconsistent arguments of `panel-extra` in `panelLock`

[Fei Chen]

Hi, in the example there are two parameters (panelData, context) at line 77

rc-dock/example/panel-extra.jsx

Lines 75 to 81 in bec7fff

 panelLock: { 
   minWidth: 200, 
   panelExtra: (panelData, context) => ( 
     <button className='btn' 
             onClick={() => context.dockMove(newTab(), panelData, 'middle')}> 
       add 
     </button> 

but in the type definition, there is only one parameter (panelData)

rc-dock/es/DockData.d.ts

Line 191 in bec7fff

 panelExtra?: (panel: PanelData) => React.ReactElement; 

I am confused about this example when using rc-dock in tsx.
Could you please tell me more?

Thanks.