docs: public int clearAllRequests() {
          
          List<RequestInfo> requests = 
          		commandService.execute(new org.jbpm.shared.services.impl.commands.QueryStringCommand<List<RequestInfo>>("select r from RequestInfo r"));
          
          commandService.execute(new org.jbpm.shared.services.impl.commands.RemoveObjectCommand(requests.toArray()));
  
          return requests.size();
      }