fill
This is an in-place operation. Use this function to fill missing days (the function adds NaNs) both in the future and in the past (up to the specified number of days in the past). Since the SDK does not return a value for the score in a day where the confidence it too low, this function can be useful to fill in blanks for UI/UX purposes.
Return
the current TimeSeries as this is an in-place operation
Parameters
rewind
how many days to fill in in the past