code: public Rule Abbreviation() {
          Var<AbbreviationNode> node = new Var<AbbreviationNode>();
          return NodeSequence(
                  NonindentSpace(), '*', Label(), push(node.setAndGet(new AbbreviationNode(popAsNode()))),
                  Sp(), ':', Sp(), AbbreviationText(node),
                  abbreviations.add(node.get())
          );
      }
docs: ************* ABBREVIATIONS ****************