code: function(projectConfig, experimentId, logger) {
      if (projectConfig.experimentIdMap.hasOwnProperty(experimentId)) {
        var experiment = projectConfig.experimentIdMap[experimentId];
        if (!!experiment) {
          return experiment;
        }
      }
  
      logger.log(LOG_LEVEL.ERROR, sprintf(ERROR_MESSAGES.INVALID_EXPERIMENT_ID, MODULE_NAME, experimentId));
      return null;
    }
docs: Get experiment from provided experiment id. Log an error if no experiment
  exists in the project config with the given ID.
  @param  {Object} projectConfig  Object representing project configuration
  @param  {string} experimentId  ID of desired experiment object
  @return {Object} Experiment object