private void applyDefaultTheme(final TileRendererLayer rendererLayer) {
        rendererLayer.setXmlRenderTheme(MapsforgeThemes.OSMARENDER);
        applyScales(rendererLayer, Settings.RENDERTHEMESCALE_DEFAULTKEY);
    }
Helper class for Map Theme selection and related tasks.
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Works in conjunction with {@link RenderThemeSettings} (for theme settings GUI).
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Note: this class is an attempt to bundle all large parts of this code were simply moved from class
NewMap and might need refactoring.
main/src/main/java/cgeo/geocaching/maps/mapsforge/v6/RenderThemeHelper.java