How to use the array-unique.immutable function in array-unique

many (ids) {
    this.debugMessage(`many(${this.url}) called (${ids.length} ids)`)

    if (!this.isBulk) {
      return Promise.reject(new Error('"many" is only available for bulk expanding endpoints'))
    }

    // Exit out early if we don't request any ids
    if (ids.length === 0) {
      return Promise.resolve([])
    }

    // Always only work on unique ids, since that's how the API works
    ids = unique.immutable(ids)

    // There is no cache time set, so always use the live data
    if (!this.cacheTime) {
      return this._many(ids)
    }

    // Get as much as possible out of the cache
    const hashes = ids.map(id => this._cacheHash(id))
    const handleCacheContent = (cached) => {
      cached = cached.filter(x => x)

      if (cached.length === ids.length) {
        this.debugMessage(`many(${this.url}) resolving fully from cache`)
        return cached
      }

function component(alias, baseComponent, requirements, payload) {
    return {
        alias: alias,
        base: baseComponent,
        requirements: requirements
            ? unique([ baseComponent ].concat(requirements))
            : [ baseComponent ],
        payload: payload
    }
}