int version = IOUtil.readInt( in );
IOUtil.readInt( in );
	protected void readContentV0( DataInputStream in ) throws IOException	{		int version = IOUtil.readInt( in );		int filedId = IOUtil.readInt( in );		while ( filedId != FIELD_NONE )		{			readField( VERSION_0, filedId, in );			filedId = IOUtil.readInt( in );		}	}