@UiChild(tagname="backButton", limit=1)
    public void setBackButton(JQMButton button) {
        button.setBack(true);
        setLeftButton(button);
    }
@ UiChild ( tagname = "backButton" , limit = 1 ) public void setBackButton ( JQMButton button ) { button . setBack ( true ) ; setLeftButton ( button ) ; }
Sets the given button in the left position and sets that buttons role
to back. Any existing left button will be replaced.

@param button
the new back button