Method fetchForCampaign

app/collections/Levels.js:36–40

(campaignSlug, options)

    }

    fetchForCampaign (campaignSlug, options) {
      if (options == null) { options = {} }
      options.url = `/db/campaign/${campaignSlug}/levels`
      return this.fetch(options)
    }

    getSolutionsMap (languages) {
      return this.models.reduce((map, level) => {