//  4) Only 1 sample of each language can exist in the same collection.

  var GRADLE_DSLs = ["groovy", "kotlin"];
  var preferredBuildScriptLanguage = initPreferredBuildScriptLanguage();

  // Ensure preferred DSL is valid, defaulting to Kotlin DSL
  function initPreferredBuildScriptLanguage() {
    var lang = window.localStorage.getItem("preferred-gradle-dsl");
    if (GRADLE_DSLs.indexOf(lang) === -1) {