* @returns {[Object]} Returns a list of objects for each platform containing info about the changes to files in that platform
 * @example {{ owners | categorize(branch.diff.files_metadata) }}
 */

function categorize(fileOwners, fileMetadatas) {
    const result = new Map();
    [...fileOwners.keys()].forEach(platform => {
        result.set(platform, {
            name: platform,

 * @returns {[Object]} Returns list of computed summary statistic objects for each platform in the input groupedFiles
 * @example {{ fileOwners | categorize(branch.diff.files_metadata) | changeStatistics(branch.diff.files_metadata) }}
 */
function computeStatistics(groupedFiles, fileMetadatas) {
    let totalAdditions = 0;
    let totalDeletions = 0
    let totalChangedFiles = 0;

 * @param {String} title - description of how data is grouped
 * @returns {String} Returns the formatted HTMl table string.
 * @example {{ owners | categorize(branch.diff.files_metadata) | computeStatistics(branch.diff.files_metadata) | summaryTable('Platform') }}
 */
function summaryTable(statistics, title) {
    let preppedStatistics = statistics.filter(s => s.files.length > 0)

 * @param {String} fieldName - The name of the field for the group to return
 * @returns String - The specified value
 * @example {{ files | byPlatform | categorize(branch.diff.files_metadata) | readField('jvm', 'name') }}
 */

function readField(objects, objectName, fieldName) {
    let group = Object.values(objects).find(s => s.name === objectName);
    if (group) {