code: private Set<String> validatePathAndRetrievePathParams(ValidationHelper helper, Context context, String pathStr) {
          String pathToCheck = pathStr;
          Set<String> pathParameters = new HashSet<String>();
  
          while (pathToCheck.contains("{")) {
              if (!pathToCheck.contains("}")) {
                  final String message = Tr.formatMessage(tc, "pathItemInvalidFormat", pathStr);
                  helper.addValidationEvent(new ValidationEvent(ValidationEvent.Severity.ERROR, context.getLocation(), message));
                  return pathParameters;
              }
              int firstIndex = pathToCheck.indexOf("{");
              int lastIndex = pathToCheck.indexOf("}");
  
              if (firstIndex > lastIndex) {
                  final String message = Tr.formatMessage(tc, "pathItemInvalidFormat", pathStr);
                  helper.addValidationEvent(new ValidationEvent(ValidationEvent.Severity.ERROR, context.getLocation(), message));
                  return pathParameters;
              }
  
              String parameter = pathToCheck.substring(firstIndex + 1, lastIndex);
  
              if (parameter.isEmpty() || parameter.contains("{") || parameter.contains("/")) {
                  final String message = Tr.formatMessage(tc, "pathItemInvalidFormat", pathStr);
                  helper.addValidationEvent(new ValidationEvent(ValidationEvent.Severity.ERROR, context.getLocation(), message));
                  return pathParameters;
              }
  
              pathParameters.add(parameter);
              pathToCheck = pathToCheck.substring(lastIndex + 1);
          }
  
          if (pathToCheck.contains("}")) {
              final String message = Tr.formatMessage(tc, "pathItemInvalidFormat", pathStr);
              helper.addValidationEvent(new ValidationEvent(ValidationEvent.Severity.ERROR, context.getLocation(), message));
              return pathParameters;
          }
  
          return pathParameters;
      }
docs: Validate the path and extract path parameters