code: public static String findATmpDir(){
          String osTmpDir = new Os.TmpDirFinder().get().get();
          return osTmpDir + File.separator +
                  BROOKLYN_DIR + File.separator +
                  Strings.makeRandomId(8);
      }
docs: Generates a tmp directory based on:</br>
  TMP_OS_DIRECTORY/brooklyn/ENTITY_ID/RANDOM_STRING(8)
  @return