code: public List<String> getRunningWorkflow(String workflowName, Integer version) {
          Preconditions.checkArgument(StringUtils.isNotBlank(workflowName), "Workflow name cannot be blank");
          return getForEntity("workflow/running/{name}", new Object[]{"version", version}, new GenericType<List<String>>() {
          }, workflowName);
      }
docs: Retrieve all running workflow instances for a given name and version
  
  @param workflowName the name of the workflow
  @param version      the version of the wokflow definition. Defaults to 1.
  @return the list of running workflow instances