How to use the @entando/utils.isInteger function in @entando/utils

const isLastPageValid = (lastPage) => {
  if (!isInteger(lastPage)) {
    return false;
  }
  return true;
};

const isPageSizeValid = (pageSize) => {
  if (!isInteger(pageSize) || pageSize < 0) {
    return false;
  }
  return true;
};

const isTotalItemsValid = totalItems => isInteger(totalItems) && totalItems > 0;

const isPageValid = (page, lastPage) => {
  if (!isInteger(page) ||
    page < 1 ||
    page > lastPage
  ) {
    return false;
  }
  return true;
};