code: function exporter (client) {
    return function exporter (variantId) {
      const req = {
        url: `${client.baseUrl}/rest/export/${variantId}/installations`,
        method: 'GET'
      };
  
      return request(client, req)
        .then((response) => {
          // API says there is only a 200 response
          return Promise.resolve(response.body);
        });
    };
  }
docs: A function for exporting as JSON representation(gzip'd) of the installations for a given variant.
  @param {string} variantId - The id of the variant
  @returns {Promise} A promise that will resolve with the Array of installation objects
  @example
  adminClient(baseUrl, settings)
  .then((client) => {
  client.installations.exporter(variantId)
  .then((installations) => {
  console.log(installations) // [{...},{...}, ...]
  })
  })