Error
Traceback (most recent call last):
  File "/home/janvanrijn/anaconda3/envs/openml-python/lib/python3.6/unittest/case.py", line 59, in testPartExecutor
    yield
  File "/home/janvanrijn/anaconda3/envs/openml-python/lib/python3.6/unittest/case.py", line 605, in run
    testMethod()
  File "/home/janvanrijn/projects/openml-python/tests/test_runs/test_run_functions.py", line 610, in test_get_run_trace
    trace = openml.runs.functions._create_trace_from_arff(
AttributeError: module 'openml.runs.functions' has no attribute '_create_trace_from_arff'