How to use the @optimizely/js-sdk-utils.NOTIFICATION_TYPES function in @optimizely/js-sdk-utils

STICKY_BUCKETING_KEY: '$opt_experiment_bucket_map',
  USER_AGENT: '$opt_user_agent',
};

exports.JAVASCRIPT_CLIENT_ENGINE = 'javascript-sdk';
exports.NODE_CLIENT_ENGINE = 'node-sdk';
exports.REACT_CLIENT_ENGINE = 'react-sdk';
exports.NODE_CLIENT_VERSION = '3.4.0-beta';

exports.VALID_CLIENT_ENGINES = [
  exports.NODE_CLIENT_ENGINE,
  exports.REACT_CLIENT_ENGINE,
  exports.JAVASCRIPT_CLIENT_ENGINE,
];

exports.NOTIFICATION_TYPES = jsSdkUtils.NOTIFICATION_TYPES;

exports.DECISION_NOTIFICATION_TYPES = {
  AB_TEST: 'ab-test',
  FEATURE: 'feature',
  FEATURE_TEST: 'feature-test',
  FEATURE_VARIABLE: 'feature-variable',
};

/*
 * Represents the source of a decision for feature management. When a feature
 * is accessed through isFeatureEnabled or getVariableValue APIs, the decision
 * source is used to decide whether to dispatch an impression event to
 * Optimizely.
 */
exports.DECISION_SOURCES = {
  FEATURE_TEST: 'feature-test',