code: function (spaceIdentifier, params) {
        var path;
        if (spaceIdentifier) {
          path = this.constructPath(constants.SPACES, spaceIdentifier, constants.PRESENCE);
          return this.Core.GET(path, params);
        } else {
          return this.rejectRequest('Bad Request: A space identifier is required.');
        }
      }
docs: Get all the presence for a space
  @param  {String|Integer}   spaceIdentifier A Robin space identifier
  @param  {Object|undefined} params          A querystring object
  @return {Function}                         A Promise