presto-orc/src/main/java/io/prestosql/orc/OrcOutputBuffer.java/OrcOutputBuffer/writeByte
class OrcOutputBuffer:    @Override
    public void writeByte(int value)
    {
        ensureWritableBytes(SIZE_OF_BYTE);
        slice.setByte(bufferPosition, value);
        bufferPosition += SIZE_OF_BYTE;
    }