bj_enumDestructableRadius

what exactly does bj_enumDestructableRadius do? I have seen it in a function i am trying to learn from yet i can't figure out what it is doing? Is there anyway to find what all these native functions do, i have checked jassforge, they explain how to use the functions but not what they do. Any help would be appreciated

it is a global variable that you can use if you want. probably a good idea to save it's value in a local variable and set it back when done using it, though.

Whats its original value, in the function i am learning from it has this line

local Real Duration = bj_enumDestructableRadius

So i am asumming it has a default value or something, any idea?

i don't know what it's used for. that line it just to save whatever the value was, so it can be restored later.