@Override
  public void setCriticalOffHeapPercentage(final float offHeapPercentage) {
    criticalOffHeapSet = true;
    criticalOffHeapPercentage = offHeapPercentage;
  }
Determine if the critical heap was configured

@return true if it was configured
geode-core/src/main/java/org/apache/geode/internal/cache/xmlcache/ResourceManagerCreation.java