Modified sunflower

test/codegen/expect/sunflower/circle.js

+var circle = dart.defineLibrary(circle, {});
+var core = dart.import(core);
+(function(exports, core) {
+  'use strict';
+  class Circle extends core.Object {
+    Circle(x, y, radius) {
+      this.x = x;
+      this.y = y;
+      this.radius = radius;
+    }
+  }
+  dart.setSignature(Circle, {
+    constructors: () => ({Circle: [Circle, [core.num, core.num, core.num]]})
+  });
+  // Exports:
+  exports.Circle = Circle;
+})(circle, core);