src/main/java/org/nustaq/serialization/FSTConfiguration.java
public FSTObjectOutput getObjectOutput(OutputStream out) {
        FSTObjectOutput fstObjectOutput = getOut();
        fstObjectOutput.resetForReUse(out);
        return fstObjectOutput;
    }
public FSTObjectOutput getObjectOutput(OutputStream out) {
        FSTObjectOutput fstObjectOutput = getOut();
        fstObjectOutput.resetForReUse(out);
        return fstObjectOutput;
    }
utility for thread safety and reuse. Do not close the resulting stream. However you should close
the given OutputStream 'out'
@param out - can be null (temp bytearrays stream is created then)
@return