Explicitly import legacy IDE.

Uses SourceArea from it.

src/ProfStef.js

@@ -2,6 +2,10 @@ define(["amber/boot", "require", "amber/core/Kernel-Objects", "amber/web/Web"],
 var $core=$boot.api,nil=$boot.nilAsValue,$nil=$boot.nilAsReceiver,$recv=$boot.asReceiver,$globals=$boot.globals;
 var $pkg = $core.addPackage("ProfStef");
 $pkg.innerEval = function (expr) { return eval(expr); };
+$pkg.imports = ["amber/legacy/IDE"];
+//>>excludeStart("imports", pragmas.excludeImports);
+$pkg.isReady = new Promise(function (resolve, reject) { requirejs(["amber/legacy/IDE"], function () {resolve();}, reject); });
+//>>excludeEnd("imports");
 $pkg.transport = {"type":"amd","amdNamespace":"profstef"};
 
 $core.addClass("AbstractTutorial", $globals.Object, [], "ProfStef");

src/ProfStef.st

@@ -1,4 +1,5 @@
 Smalltalk createPackage: 'ProfStef'!
+(Smalltalk packageAt: 'ProfStef' ifAbsent: [ self error: 'Package not created: ProfStef' ]) imports: {'amber/legacy/IDE'}!
 Object subclass: #AbstractTutorial
 	slots: {}
 	package: 'ProfStef'!