serialization different function formation

a.js

const serializePackageItem = R.pick([
  'offeringOptions',
  'offeringId',
  'offeringPackageOptionId',
  'durationAmount',
  'durationTypeId',
  'startDate',
  'selectedPackageOptionItems'
])

const omitOfferings = overProp('selectedPackageOptionItems', R.map(R.ommit('offering')))
const whenHasPackageItems = R.when(R.has('selectedPackageOptionItems'))

const serializePackageItems = R.compose(
  whenHasPackageItems(omitOfferings),
  serializePackageItem
)

const serializeOfferingOptionsFields = overProp('offeringOptions', R.map(serializePackageItems))

const serializePreviewFilter = R.compose(
  serializeOfferingOptionsFields,
  addMinMaxAge,
  addCustomItems,
)