@Override
    public int getRowCount() {
        return presenter.getRowCount();
    }
Return the outer element that contains all of the rendered row values. This
method delegates to {@link #getChildContainer()};

@return the {@link Element} that contains the rendered row values
stroom-core-client-widget/src/main/java/com/google/gwt/user/cellview/client/AbstractHasData.java