docs: public RuleModel getSimpleRuleModel(final String drl) {
          final RuleModel rm = new RuleModel();
          rm.setPackageName(PackageNameParser.parsePackageName(drl));
          rm.setImports(ImportsParser.parseImports(drl));
  
          final Pattern rulePattern = Pattern.compile(".*\\s?rule\\s+(.+?)\\s+.*",
                                                      Pattern.DOTALL);
          final Pattern lhsPattern = Pattern.compile(".*\\s+when\\s+(.+?)\\s+then.*",
                                                     Pattern.DOTALL);
          final Pattern rhsPattern = Pattern.compile(".*\\s+then\\s+(.+?)\\s+end.*",
                                                     Pattern.DOTALL);
  
          final Matcher ruleMatcher = rulePattern.matcher(drl);
          if (ruleMatcher.matches()) {
              String name = ruleMatcher.group(1);
              if (name.startsWith("\"")) {
                  name = name.substring(1);
              }
              if (name.endsWith("\"")) {
                  name = name.substring(0,
                                        name.length() - 1);
              }
              rm.name = name;
          }
  
          final Matcher lhsMatcher = lhsPattern.matcher(drl);
          if (lhsMatcher.matches()) {
              final FreeFormLine lhs = new FreeFormLine();
              lhs.setText(lhsMatcher.group(1) == null ? "" : lhsMatcher.group(1).trim());
              rm.addLhsItem(lhs);
          }
  
          final Matcher rhsMatcher = rhsPattern.matcher(drl);
          if (rhsMatcher.matches()) {
              final FreeFormLine rhs = new FreeFormLine();
              rhs.setText(rhsMatcher.group(1) == null ? "" : rhsMatcher.group(1).trim());
              rm.addRhsItem(rhs);
          }
  
          return rm;
      }