Modding Help Making objects drop a certain item and not from a pool

i'm trying to make a object drop a certain item once its broken but i cant find what the option is

 

If it's a smashable object you can add something like the following code to your object file:

Code:

"smashDropOptions": [
    [ [ "item1", 1, {} ] ],
    [ [ "item2", 1, {} ] ],
    [ [ "item3", 1, {} ] ]
  ],

Each item has an equal chance to drop. Not all of them will drop each time; just one.

 

i was wondering what that was for
thanks