WindowedMultipole.window Index question

[mlazaric97]

Hello,

In the help(WindowedMultipole) documentation the WindowedMultipole object is described as below:
windows : np.ndarray
A 2D array of Integral values. windows[i, 0] - 1 is the index of the
first pole in window i. windows[i, 1] - 1 is the index of the last pole
in window i.

When interacting with this object I'm finding that the first window (i.e windows[0,:]) is often [0,-1]. Does this mean the indices are therefore -1 and -2 respectively (due to the "-1" in the documentation above)?