Update: add some comments

doric-js/lib/src/pattern/modular.d.ts

@@ -44,7 +44,14 @@ export declare abstract class ModularPanel extends Module {
     private modules;
     private scheduledRebuild?;
     constructor();
+    /**
+     * @returns Class list of current submodules
+     */
     abstract setupModules(): ClassType<Panel>[];
+    /**
+     * @param root Current module's rootview
+     * @returns provided for submodules as their rootview
+     */
     abstract setupShelf(root: Group): Group;
     dispatchMessage(message: any): void;
     get mountedModules(): Panel[];