how to calculate lowestVisibleY

I am trying to workout how to get hold of a value for `lowestVisibleY`

It is the `min` value passed to `AxisRendererBase::computeAxisValues(min: Double, max: Double)` however doesn't appear to persist anywhere. Other than modifying the code, is there a clean way to `get` or `calculate` this value?

Start by reading AxisRendererBase::computeAxisValues(min: Double, max: Double) and trace how its min argument is used after the method returns. Check whether the repository exposes an existing accessor or calculation for lowestVisibleY; done would be a clearly supported way to obtain the value, with any relevant behavior covered by tests.

Written by the indexing model from the issue text.