docs: protected void recordExpression( final Expression expression,
                                       final String nodeName,
                                       final Node parentNode ) throws Exception {
          // TODO handle all the different types of expressions
          final Node expressionNode = parentNode.addNode(nodeName, ClassFileSequencerLexicon.EXPRESSION);
          expressionNode.setProperty(ClassFileSequencerLexicon.CONTENT, expression.toString());
          recordSourceReference(expression, expressionNode);
      }