docs: protected boolean clearSpecial(DatabaseConnection connection, Logger logger) {
  		NestedConnection currentSaved = specialConnection.get();
  		boolean cleared = false;
  		if (connection == null) {
  			// ignored
  		} else if (currentSaved == null) {
  			logger.error("no connection has been saved when clear() called");
  		} else if (currentSaved.connection == connection) {
  			if (currentSaved.decrementAndGet() == 0) {
  				// we only clear the connection if nested counter is 0
  				specialConnection.set(null);
  			}
  			cleared = true;
  		} else {
  			logger.error("connection saved {} is not the one being cleared {}", currentSaved.connection, connection);
  		}
  		// release should then be called after clear
  		return cleared;
  	}