@Override
    public void writeInt64(int fieldNumber, long value, boolean repeated) throws IOException
    {
        tail = writeTagAndRawVarInt64(
                makeTag(fieldNumber, WIRETYPE_VARINT),
                value,
                this,
                tail);
    }
Resets this output for re-use.
protostuff-core/src/main/java/io/protostuff/ProtobufOutput.java