As @Silver-Streak wrote, you can’t parse all al the children at once. But you could JSONify the array/structure, update it, and then parse it back to the variable, as I described in your other post.
As @Silver-Streak wrote, you can’t parse all al the children at once. But you could JSONify the array/structure, update it, and then parse it back to the variable, as I described in your other post.