function getResponsiveClass(type) {
  switch (type) {
    case 2:
      return CLASS_HIDE_XS_DOWN;
    case 3:
      return CLASS_HIDE_SM_DOWN;
    case 4:
      return CLASS_HIDE_MD_DOWN;
    default:
      return '';
  }
}
Get the related class name of a responsive type number.
@param {string} type - The responsive type.
@returns {string} The related class name.