How to use the @redux-saga/is.buffer function in @redux-saga/is

export function channel(buffer = buffers.expanding()) {
  let closed = false
  let takers = []

  if (process.env.NODE_ENV !== 'production') {
    check(buffer, is.buffer, INVALID_BUFFER)
  }

  function checkForbiddenStates() {
    if (closed && takers.length) {
      throw internalErr(CLOSED_CHANNEL_WITH_TAKERS)
    }
    if (takers.length && !buffer.isEmpty()) {
      throw internalErr('Cannot have pending takers with non empty buffer')
    }
  }

  function put(input) {
    if (process.env.NODE_ENV !== 'production') {
      checkForbiddenStates()
      check(input, is.notUndef, UNDEFINED_INPUT_ERROR)
    }

export function actionChannel(pattern, buffer) {
  if (process.env.NODE_ENV !== 'production') {
    check(pattern, is.pattern, 'actionChannel(pattern,...): argument pattern is not valid')

    if (arguments.length > 1) {
      check(buffer, is.notUndef, 'actionChannel(pattern, buffer): argument buffer is undefined')
      check(buffer, is.buffer, `actionChannel(pattern, buffer): argument ${buffer} is not a valid buffer`)
    }
  }

  return makeEffect(effectTypes.ACTION_CHANNEL, { pattern, buffer })
}