Traceback (most recent call last):
  File "test_zz9.py", line 228, in <module>
    euro_scene.save_dataset(product, pngfile)
  File "/usr/lib/python3.6/site-packages/satpy/scene.py", line 1309, in save_dataset
    compute=compute, **save_kwargs)
  File "/usr/lib/python3.6/site-packages/satpy/writers/__init__.py", line 828, in save_dataset
    decorate=decorate, fill_value=fill_value)
  File "/usr/lib/python3.6/site-packages/satpy/writers/__init__.py", line 466, in get_enhanced_image
    enhancer.apply(img, **dataset.attrs)
  File "/usr/lib/python3.6/site-packages/satpy/writers/__init__.py", line 1057, in apply
    fun(img, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/satpy/enhancements/__init__.py", line 30, in stretch
    return img.stretch(**kwargs)
  File "/usr/lib/python3.6/site-packages/trollimage/xrimage.py", line 969, in stretch
    self.stretch_linear(**kwargs)
TypeError: stretch_linear() got an unexpected keyword argument 'min_stretch'