code: public Rule TableColumn(Var<TableNode> tableNode, Var<Boolean> pipeSeen) {
          Var<TableColumnNode> node = new Var<TableColumnNode>(new TableColumnNode());
          return Sequence(
                  NodeSequence(
                          push(node.get()),
                          Sp(),
                          Optional(':', node.get().markLeftAligned()),
                          Sp(), OneOrMore('-'), Sp(),
                          Optional(':', node.get().markRightAligned()),
                          Sp(),
                          Optional('|', pipeSeen.set(Boolean.TRUE))
                  ),
                  tableNode.get().addColumn((TableColumnNode) pop())
          );
      }
docs: vsch: TableColumnNode was not setting source range