expect(spec.getAsset("stylesheet")).andReturn(asset);
expect(op.getPropertyType("stylesheetAsset")).andReturn(IAsset.class);
op.claimReadonlyProperty("stylesheetAsset");
expect(op.getAccessorMethodName("stylesheetAsset")).andReturn("getStylesheetAsset");
op.addMethod(eq(Modifier.PUBLIC), isA(MethodSignature.class),
eq("return getAsset(\"stylesheet\");"), eq(l));