Why the "sleep" and "wake" method aren't implemented, like for the [SSD1306](https://github.com/adafruit/Adafruit_CircuitPython_DisplayIO_SSD1306/blob/82215a51b7ba3ee9d6a762e5ae81c6d46e28a450/adafruit_displayio_ssd1306.py#L100) for instance?
