Case Study 1: GUI building with JLIB
Flexible widget constructors lighten the code

• JLIB functions may have any number of args
• their args are dispatched on types
• JLIB provides support for commonly used abstractions
• JLIB also provides escapes to most general tools

(define b
   (button "abc"                               ;; string is button label
           (color 255 80 10)                   ;; background color
           (action (lambda(e) (.hide w)))      ;; action function
           (HelveticaBold 24)                  ;; font
           (lambda(t) (.setForeground t blue)) ;; general property setting
      )