Method showBackButton

CodenameOne/src/com/codename1/ui/Sheet.java:609–611

()

    /// Shows the back button.
    public void showBackButton() {
        backButton.setVisible(true);
    }

    /// Gets the container that is rendered on the top right bar of the sheet.  Use this
    /// to add buttons and other content you wish to appear in the title bar.  Best not to