Adafruit CircuitPython 4.0.0-beta.5 on 2019-03-17; Adafruit PyPortal with samd51j20
>>> import displayio
>>> import adafruit_imageload
>>> image, palette = adafruit_imageload.load("/4bit.bmp", bitmap=displayio.Bitmap, palette=displayio.Palette)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "adafruit_imageload/__init__.py", line 51, in load
  File "adafruit_imageload/__init__.py", line 49, in load
  File "adafruit_imageload/bmp/__init__.py", line 56, in load
  File "adafruit_imageload/bmp/indexed.py", line 80, in load
AttributeError: 'Bitmap' object has no attribute '_load_row'
>>>