@Override
          public String load(LoaderHelper<Integer, String> helper) throws CacheLoaderException {
            numLoaderInvocations.incrementAndGet();
            return helper.getKey().toString();
          }
Test that LocalRegion cache Loads are not stored in the Region if the VM is in a critical
state, then test that they are allowed once the VM is no longer critical
geode-core/src/distributedTest/java/org/apache/geode/cache/management/MemoryThresholdsDUnitTest.java