From Xojo Documentation
Returns a FolderItem that represents a file or folder/directory within this FolderItem with the matching index passed.
If followAlias is true, shortcuts and aliases are resolved on all platforms.
Returns Nil only when some portion of the path to the child does not exist. For example:
will return Nil if:
- SpecialFolder.System is nil or does not exist
- the folder "Yummy" does not exist
- there is nothing in the folder "Yummy"