[OpenMap Users] Display GraticuleLayer with lines below 1 degree

I'm using the following properties for the GraticuleLayer:

                Properties props = this.getProperties(null);
                
                props.setProperty(GraticuleLayer.EquatorColorProperty, "FFFF0000");
                props.setProperty(GraticuleLayer.BelowOneDegreeColorProperty, "FFFF0000");
                props.setProperty(GraticuleLayer.OneDegreeColorProperty, "FF00FFFF");
                props.setProperty(GraticuleLayer.FiveDegreeColorProperty, "FFFF0000");
                props.setProperty(GraticuleLayer.ThresholdProperty, "5");
                props.setProperty(GraticuleLayer.ShowBelowOneProperty, "true");// not working
                props.setProperty(GraticuleLayer.ShowOneAndFiveProperty, "true");//
not working

                this.setProperties(props);

ShowBelowOneProperty and ShowOneAndFiveProperty do not seem to effect
the display of the grid (while I have verified the colors and
threshold do have an effect). The grid is currently displaying with
10 degree, 5 degree, and 1 degree lines (as a function of zoom &
threshold). I would like to draw additional lines inside 1 degree
using the same threshold setting.

Anyone know if the ShowBelowOneProperty is supported?

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