private void addTestToCategory(String category, String testClass) {
    Set<String> listOfTests = sourceToTestMapping.computeIfAbsent(category, k -> new TreeSet<>());
    listOfTests.add(testClass);
  }
This class is intended as a helper to the CI StressNewTest job. Given a list of changed test java
files, it expands the list to include any subclasses and outputs a partial Gradle command line to
execute those tests depending on the 'category' of test (unit, distributed, etc.).
geode-junit/src/main/java/org/apache/geode/test/util/StressNewTestHelper.java