function KillTree takes nothing returns nothing
        call KillDestructable(GetEnumDestructable())
endfunction

function trololo takes nothing returns nothing
...
local rect r = Rect(x - RADIUS,y - RADIUS,x + RADIUS,y + RADIUS)
...
call EnumDestructablesInRect(r,null,function KillTree)
call RemoveRect(r)
set r = null
endfunction