public static String join(List l, String joinString) {
    StringBuilder result = new StringBuilder(80);
    boolean firstTime = true;
    for (final Object o : l) {
      if (firstTime) {
        firstTime = false;
      } else {
        result.append(joinString);
      }
      result.append(o);
    }
    return result.toString();
  }
Represents a list of ResourceInst that have been combined together. Note the most common case
is for this class to only own a single ResourceInst.
geode-core/src/main/java/org/apache/geode/internal/SystemAdmin.java