ref: 9f76a7f6819ac04552b4fb6588156f3e4089d1d7
dir: /opt/misc/appl/hello.b/
implement Hello; include "sys.m"; sys: Sys; include "draw.m"; Hello: module { init: fn(ctxt: ref Draw->Context, argv: list of string); }; init(ctxt : ref Draw->Context, argv: list of string) { sys = load Sys Sys->PATH; sys->print("Hello World!\n"); }