code: function prepareResponse(validDataSources, invalidDataSources, cb) {
    //There Were Errors Updating Data Sources, should return an error
  
    logger.debug("prepareResponse Before", validDataSources);
    //For The Valid Data Sources, Just want the updated Document JSON
    validDataSources = _.map(validDataSources, function(validDataSourceData) {
      return processDataSourceResponse(validDataSourceData.document.toJSON());
    });
  
    logger.debug("prepareResponse After", validDataSources);
  
    var returnError;
    if (invalidDataSources.length > 0) {
      returnError = buildErrorResponse({
        error: new Error("Error Updating Data Sources"),
        code: ERROR_CODES.FH_FORMS_UNEXPECTED_ERROR
      });
    }
  
    return cb(returnError, {
      validDataSourceUpdates: validDataSources,
      invalidDataSourceUpdates: invalidDataSources
    });
  }
docs: Preparing The JSON Response For The Data Source Cache Update.
  @param validDataSources
  @param invalidDataSources
  @param cb
  @returns {*}