digester.addCallMethod("tobago-config/resource-dir", "addResourceDir", 0);
// enable ajax
digester.addCallMethod("tobago-config/ajax-enabled", "setAjaxEnabled", 0);
digester.addObjectCreate("tobago-config/renderers", RenderersConfigImpl.class);
digester.addSetNext("tobago-config/renderers", "setRenderersConfig");
digester.addObjectCreate("tobago-config/renderers/renderer", RendererConfig.class);
digester.addSetNext("tobago-config/renderers/renderer", "addRenderer");
digester.addCallMethod("tobago-config/renderers/renderer/name", "setName", 0);
digester.addObjectCreate("tobago-config/renderers/renderer/supported-markup", MarkupConfig.class);
digester.addSetNext("tobago-config/renderers/renderer/supported-markup", "setMarkupConfig");