lib/interceptors.js
function(datasetId, queryParams, callback) {
      var interceptor = responseInterceptors[datasetId] || defaults.responseInterceptor;
      return interceptor(datasetId, queryParams, callback);
    }
function(datasetId, queryParams, callback) {
      var interceptor = responseInterceptors[datasetId] || defaults.responseInterceptor;
      return interceptor(datasetId, queryParams, callback);
    }
//TODO: what is the purpose of this function?
@param {String} datasetId
@param {Object} queryParams
@param {Function} callback