Autotranslation does not respect set_index for pandas dataframe

[LeeTZ]

With the following code in GeneralAutotranslation.ipynb:

%%python
import pandas as pd
df = pd.read_csv('../resources/data/interest-rates.csv')
df.set_index('time')
beakerx.rates = df

And beakerx.rates would not set time column as the index column.
If we do

df = df.set_index('time')

instead, then time column would omits in output.