Is `VisitBaseType` internal field used consistently?

[IVNSTN]

While diving deep into debugging my app I accidentally have noticed this: TSqlFragmentVisitor final code contains many blocks which check of VisitBaseType internal field value and if it is true then Visit method for base types is called, but for some sql-fragment classes Visit method implementation has this check negated and the behavior is reversed:

 // Summary:
 // Visitor for DeclareCursorStatement
 public virtual void Visit(DeclareCursorStatement node)
 {
 if (!VisitBaseType) <<<--- here
 {
 Visit((TSqlFragment)node);
 }
 }

 //
 // Summary:
 // Explicit Visitor for DeclareCursorStatement
 public virtual void ExplicitVisit(DeclareCursorStatement node)
 {
 if (VisitBaseType)
 {
 Visit((TSqlStatement)node);
 Visit((TSqlFragment)node);
 }

 Visit(node);
 node.AcceptChildren(this);
 }

Is this expected behavior? If so, please clarify what was the intent, how VisitBaseType should be understood.