beforeUnSelect error

Hello.

https://snippet.dhtmlx.com/o5867eq9

First, Please look at the Snippet.
If I press “text”, I want to keep the previously selected cell.

To do this,

grid.events.on(“BeforeUnSelect”, function(row, col){
console.log(“beforeUnSelect”, row, col);
return false;
});

I’ve tried that grammar, and it affects the entire grid.
And if I specify false after multiple selections, a stack call error will occur.

I want to set the unselect to false only when I press the link.
What should I do? Help me