public void runDecider(String workflowId) {
        Validate.notBlank(workflowId, "workflow id cannot be blank");
        put("workflow/decide/{workflowId}", null, null, workflowId);
    }
Starts the decision task for the given workflow instance

@param workflowId the id of the workflow instance
client/src/main/java/com/netflix/conductor/client/http/WorkflowClient.java