[Baertram]

This is a good question I've never used it so far. Maybe it is for controls where the start is always the same and the suffix is the name of a child.
Like the first part is the parent and the suffic is the child.

The way that :GetChildByName("sChild") is working for a control where let's say the parent name is "ThisIsAParent" and a childs name is "ThisIsAParentsChild"

But I'm not sure, this is only a guess