How to use the react-jhipster.isPromise function in react-jhipster

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The error middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `catch`.
   * It need not run in production
   * process.env.NODE_ENV === 'development'
   */
  if (true) {
    // Dispatch initial pending promise, but catch any errors
    return next(action).catch(error => {
      console.error(`${action.type} caught at middleware with reason: ${JSON.stringify(error.message)}.`);
      if (error && error.response && error.response.data) {
        const message = getErrorMessage(error.response.data);

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The error middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `catch`.
   * It need not run in production
   */
  if (process.env.NODE_ENV === 'development') {
    // Dispatch initial pending promise, but catch any errors
    return next(action).catch(error => {
      console.error(`${action.type} caught at middleware with reason: ${JSON.stringify(error.message)}.`);
      if (error && error.response && error.response.data) {
        const message = getErrorMessage(error.response.data);
        console.error(`Actual cause: ${message}`);

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The error middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `catch`.
   * It need not run in production
   */
  if (process.env.NODE_ENV === 'development') {
    // Dispatch initial pending promise, but catch any errors
    return next(action).catch(error => {
      console.error(`${action.type} caught at middleware with reason: ${JSON.stringify(error.message)}.`);
      if (error && error.response && error.response.data) {
        const message = getErrorMessage(error.response.data);
        console.error(`Actual cause: ${message}`);

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The notification middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `then` and `catch.
   */
  return next(action)
    .then(response => {
      if (action.meta && action.meta.successMessage) {
        toast.success(action.meta.successMessage);
      } else if (response && response.action && response.action.payload && response.action.payload.headers) {
        const headers = response.action.payload.headers;
        let alert: string = null;
        let alertParams: string = null;

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The notification middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `then` and `catch.
   */
  return next(action)
    .then(response => {
      if (action.meta && action.meta.successMessage) {
        toast.success(action.meta.successMessage);
      } else if (response && response.action && response.action.payload && response.action.payload.headers) {
        const headers = response.action.payload.headers;
        let alert: string = null;
        let alertParams: string = null;

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The notification middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `then` and `catch.
   */
  return next(action)
    .then(response => {
      if (action.meta && action.meta.successMessage) {
        toast.success(action.meta.successMessage);
      } else if (response && response.action && response.action.payload && response.action.payload.headers) {
        const headers = response.action.payload.headers;
        let alert: string = null;
        let alertParams: string = null;

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The notification middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `then` and `catch.
   */
  return next(action).then(response => {
    if (action.meta && action.meta.successMessage) {
      if (typeof action.meta.successMessage === 'string') {
        toast.success(action.meta.successMessage);
      } else {
        toast.success(action.meta.successMessage[0] + response.action.payload.data.id);
      }
    }

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The notification middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `then` and `catch.
   */
  return next(action)
    .then(response => {
      if (action.meta && action.meta.successMessage) {
        toast.success(action.meta.successMessage);
      } else if (response && response.action && response.action.payload && response.action.payload.headers) {
        const headers = response.action.payload.headers;
        let alert: string = null;
        let alertParams: string = null;

export default () => next => action => {
  // If not a promise, continue on
  if (!isPromise(action.payload)) {
    return next(action);
  }

  /**
   *
   * The notification middleware serves to dispatch the initial pending promise to
   * the promise middleware, but adds a `then` and `catch.
   */
  return next(action)
    .then(response => {
      if (action.meta && action.meta.successMessage) {
        toast.success(action.meta.successMessage);
      } else if (response && response.action && response.action.payload && response.action.payload.headers) {
        const headers = response.action.payload.headers;
        let alert: string = null;
        let alertParams: string = null;