setFeatureFlags = (featureFlags) => {
  if (!window.APP_SETTINGS) window.APP_SETTINGS = {};
  if (!window.APP_SETTINGS.feature_flags) window.APP_SETTINGS.feature_flags = {};
  window.APP_SETTINGS.feature_flags = {
    ...window.APP_SETTINGS.feature_flags,
    ...featureFlags,
  };
  return window.APP_SETTINGS.feature_flags;
}
IMPORTANT NOTE: if your flags change models this helper should be invoked before `I.amOnPage()`
Sets given feature flags before LSF init
@param {object} featureFlags map of feature flags to set with boolean values
@returns {object}