/** {@inheritDoc} */
 @Override
 public int getWriteFromBehindBufferSize() {
   return store != null ? store.getWriteFromBehindBufferSize() : -1;
 }
 /** {@inheritDoc} */
 @Override
 public int getWriteFromBehindErrorRetryCount() {
   return store != null ? store.getWriteFromBehindErrorRetryCount() : -1;
 }
 /** {@inheritDoc} */
 @Override
 public int getWriteFromBehindCriticalOverflowCount() {
   return store != null ? store.getWriteFromBehindCriticalOverflowCount() : -1;
 }
 /** {@inheritDoc} */
 @Override
 public int getWriteFromBehindStoreBatchSize() {
   return store != null ? store.getWriteFromBehindStoreBatchSize() : -1;
 }
 /** {@inheritDoc} */
 @Override
 public long getWriteFromBehindFlushFrequency() {
   return store != null ? store.getWriteFromBehindFlushFrequency() : -1;
 }
 /** {@inheritDoc} */
 @Override
 public int getWriteFromBehindFlushThreadCount() {
   return store != null ? store.getWriteFromBehindFlushThreadCount() : -1;
 }