question: protected JButton createLeftOneTouchButton ( ) { SeaGlassArrowButton b = new SeaGlassArrowButton ( SwingConstants . NORTH ) ; int oneTouchSize = lookupOneTouchSize ( ) ; b . setName ( "SplitPaneDivider.leftOneTouchButton" ) ; b . setMinimumSize ( new Dimension ( oneTouchSize , oneTouchSize ) ) ; b . setCursor ( Cursor . getPredefinedCursor ( splitPane . getOrientation ( ) == JSplitPane . HORIZONTAL_SPLIT ? Cursor . W_RESIZE_CURSOR : Cursor . N_RESIZE_CURSOR ) ) ; b . setFocusPainted ( false ) ; b . setBorderPainted ( false ) ; b . setRequestFocusEnabled ( false ) ; b . setDirection ( mapDirection ( true ) ) ; return b ; }
target:  Creates and return an instance of JButton that can be used to collapse the left/top component in the split pane.