public DistributedCounters decrement(final Serializable id, final int delta) {
    counters.get(id).addAndGet(-delta);
    return this;
  }
Decrements the {@code AtomicInteger} by the specified {@code delta}.

@param id the id of the {@code AtomicInteger}
@param delta the amount by which to decrement the {@code AtomicInteger}
@return a reference to this DistributedCounters
geode-dunit/src/main/java/org/apache/geode/test/dunit/rules/DistributedCounters.java