code: public static <T extends View> T mount(T v, Renderable r) {
          Mount m = new Mount(v, r);
          mounts.put(v, m);
          render(v);
          return v;
      }
docs: Mounts a renderable function defining the layout into a View. If host is a
  viewgroup it is assumed to be empty, so the Renderable would define what
  its child views would be.
  @param v a View into which the renderable r will be mounted
  @param r a Renderable to mount into a View