@Override
protected boolean readHeader(MaxLengthRecordingInputStream in,
long payloadLength) throws IOException {
ByteCountingPushBackInputStream pbin = new ByteCountingPushBackInputStream(in, PUSHBACK_BUFFER_SIZE);
String versionLine = pbin.readLine();
String blockDescLine = pbin.readLine();
// debug
//System.out.println(versionLine);
//System.out.println(blockDescLine);
/*
* Check for version and parse if present.