question: protected Button createOpenButton ( ) { Button ob = new Button ( ) ; ob . setUIID ( "MenuButton" ) ; UIManager uim = parent . getUIManager ( ) ; Image i = ( Image ) uim . getThemeImageConstant ( "sideMenuImage" ) ; if ( i != null ) { ob . setIcon ( i ) ; } else { float size = 4.5f ; try { size = Float . parseFloat ( uim . getThemeConstant ( "menuImageSize" , "4.5" ) ) ; } catch ( Throwable t ) { t . printStackTrace ( ) ; } FontImage . setMaterialIcon ( ob , FontImage . MATERIAL_MENU , size ) ; } Image p = ( Image ) uim . getThemeImageConstant ( "sideMenuPressImage" ) ; if ( p != null ) { ob . setPressedIcon ( p ) ; } return ob ; }
target:  Creates the Side Menu open button.