public int getKeyboardSelectedRow() {
        return KeyboardSelectionPolicy.DISABLED == keyboardSelectionPolicy
                ? -1
                : getCurrentState().getKeyboardSelectedRow();
    }
Get the index of the keyboard selected row relative to the page start.

@return the row index, or -1 if disabled
stroom-core-client-widget/src/main/java/com/google/gwt/user/cellview/client/HasDataPresenter.java