public void pauseWorkflow(String workflowId) {
        Preconditions.checkArgument(
                StringUtils.isNotBlank(workflowId), "workflow id cannot be blank");
        stub.pauseWorkflow(
                WorkflowServicePb.PauseWorkflowRequest.newBuilder()
                        .setWorkflowId(workflowId)
                        .build());
    }
Pause a workflow by workflow id

@param workflowId the workflow id of the workflow to be paused
grpc-client/src/main/java/com/netflix/conductor/client/grpc/WorkflowClient.java