public static void addStyleSheetResource(FacesContext context, String libraryName, String resourceName) {
        addResource(context, RENDERER_STYLESHEET, libraryName, resourceName);
    }
Adds a CSS resource to the view.

@param context The FacesContext
@param libraryName The library name containing the resource
@param resourceName The name of the CSS resource
primefaces/src/main/java/org/primefaces/util/ResourceUtils.java