Why is the AllChildrenPathSubjectPart case in the TraversalValidator commented out?

[vrenken]

Orignal code is:

case ParentPathSubjectPart:
    ValidateParentPathSubjectPart(beforePathPart, afterPathPart);
    break;
// TODO: This probably should be activated, removed, and maybe also make us reflect on the other parent/child traversers.
// case AllChildrenPathSubjectPart:
//     if (beforePathPart is ChildrenPathSubjectPart or afterPathPart is ChildrenPathSubjectPart or beforePathPart is AllChildrenPathSubjectPart or afterPathPart is AllChildrenPathSubjectPart)
//     {
//         throw new ScriptParserException("The all children path separator cannot be combined.")
//     }
//     if (afterPathPart is ParentPathSubjectPart)
//     {
//         throw new ScriptParserException("The all children path separator cannot be followed by a parent path separator.")
//     }
//     if (afterPathPart is AllParentsPathSubjectPart)
//     {
//         throw new ScriptParserException("The all children path separator cannot be followed by an all parents path separator.")
//     }
//     break
case ChildrenPathSubjectPart:
    ValidateChildrenPathSubjectPart(beforePathPart, afterPathPart);
    break;