/// <summary> /// Visits a single <see cref="GroupNode"/>. /// </summary> /// <param name="node">The node to visit.</param> protected internal abstract void VisitGroup(GroupNode node);
/// <summary> /// Visits the children of a <see cref="GroupNode"/>. /// </summary> /// <param name="node">The node to visit.</param> protected internal override void VisitGroup(GroupNode node) => DefaultVisit(node);