void validateArguments(Object key, Object value, Object aCallbackArgument) {
    validateKey(key);
    validateValue(value);
  }
@return true if cacheWrite was performed
@see DistributedRegion#cacheWriteBeforeRegionDestroy(RegionEventImpl)
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java