RowNumbererDefaultAppearance has no resources constructor

I just downloaded the GXT 3.1.0 beta jars yesterday, and was trying to convert some grid row numbering CSS overrides that I had used in GXT 3.0.6. However, when I subclass RowNumbererDefaultAppearance and try to give it my own RowNumbererResources sub-interface, I can't because it's constructor is defined as:







public RowNumbererDefaultAppearance() {

resources = GWT.create(RowNumbererResources.class);

resources.styles().ensureInjected();

}



Typically, default appearance classes have constructors like:



public GroupSummaryViewDefaultAppearance() {

this(GWT.<GroupSummaryViewResources>create(GroupSummaryViewResources.class));

}





public GroupSummaryViewDefaultAppearance(GroupSummaryViewResources resources) {

super(resources);

}



Why doesn't the RowNumbererDefaultAppearance follow this pattern and allow setting of its resources class via a constructor? Then I could just override this default constructor to GWT.create my own resources interface instead.