src/main/java/org/nustaq/serialization/coders/FSTBytezEncoder.java
@Override
    public void flush() throws IOException {
        if ( outStream != null )
            outStream.write(getBuffer(), 0, (int) pos);
        pos = 0;
    }
@Override
    public void flush() throws IOException {
        if ( outStream != null )
            outStream.write(getBuffer(), 0, (int) pos);
        pos = 0;
    }
writes current buffer to underlying output and resets buffer.
@throws IOException