`poles` function?? Name conflict with `ControlSystems`

I have imported (`using`) both `Polynomials` and `ControlSystems`, and am told there is a name conflict: both packages export a function `poles`.

In `ControlSystems`, this is a key function (roots of denominator polynomials in transfer functions).

I am trying to find out what this function does in `Polynomials`, but I cannot find it in the documentation??

**Question**: I assume it is an important function in `Polynomials` (since it is exported), but what does it do?