code: private void ajaxIsFlowLocked(final Project project,
        final HashMap<String, Object> ret, final HttpServletRequest req)
        throws ServletException {
      final String flowName = getParam(req, FLOW_NAME_PARAM);
  
      final Flow flow = project.getFlow(flowName);
      if (flow == null) {
        ret.put(ERROR_PARAM,
            "Flow " + flowName + " not found in project " + project.getName());
        return;
      }
  
      ret.put(FLOW_ID_PARAM, flow.getId());
      ret.put(FLOW_IS_LOCKED_PARAM, flow.isLocked());
    }
docs: Returns true if the flow is locked, false if it is unlocked.
  
  @param project the project containing the flow.
  @param ret the return value.
  @param req the http request.
  @throws ServletException