Bar Chart Axis Lower Margin

In the Bar Chart, there is a property for the Category Axis Upper Margin that is default to 0.05 but there doesn’t appear to be a property for the Category Axis Lower Margin. I tried writing to the property .valAxisLowerMargin and the error states that there is no attribute with this name. I was able to write to the .valAxisUpperMargin though.

Any chance I just have the wrong name?