Get the indices(IntRange) of the views in the view group. For for-each.
Check the view group is empty.
Check the view group is not empty.
For-each the view group and find the views by condition.
For-each the view group and find the view by condition.
For-each the view group and find the view by condition, and cast to the T type.
Find view by id name
For-each for ViewGroup
For-each with index for ViewGroup
Get the id by name