display slanting X-axis in gwt visualization column chart using gwt-visualization-1.1.0.zip

I am trying to draw column chart using GWT visualization api.I am
using the following GWT visualization jar in :

http://code.google.com/p/gwt-google-apis/downloads/list/gwt-visualization-1.1.0.zip

I am trying to set the hAxis in slantedText as in GWT's java script
visualization api.But there is no options to set the hAxis in slanted
mode in using gwt-visualization-1.1.0.zip.
Hence I try to set the property option as follows,

my code is :

Options options = Options.create();
options.set("hAxis.slantedText", true);
options.set("hAxis.title", "Leave");

Still I did not get the slanted text in my column chart.

Is there any other way to set the hAxis.slanted text option ?

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