boolean basicUpdate(final EntryEventImpl event, final boolean ifNew, final boolean ifOld,
      final long lastModified, final boolean overwriteDestroyed)
      throws TimeoutException, CacheWriterException {
    return basicUpdate(event, ifNew, ifOld, lastModified, overwriteDestroyed, true, false);
  }
Clear the region from a server request.

@param callbackArgument The callback argument. This is currently null since
       {@link Map#clear} supports no parameters.
@param processedMarker Whether the marker has been processed (for durable clients)
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java