How do I make the grid into editable rows?

I want only the first row to be editable in an unmodifiable columns grid.

I found the previous version answer

Method does not exist in current version.
Is it impossible to modify the config of the add method and the update method?
Add to, Is it possible to edit the editable value only for that row?

Answer Please.

Please, try to make an editable columnn, but block the edit operations for all the rows of that column except “that-needed-row”. YOu cna block the edit operation using the beforeEditStart event. Just try to rerurn false from it.
Like:"BeforeEditStart", function(row,col,editorType){
if("yourColumnId" &&!="that_your_row")
    return false;