Appium Jasmine/Protractor Screenshot for reports

Issues/Bugs
1

I am facing a problem while I try to take screenshots on real device or emulator

I could able to see appium is trying to save screenshots but I am not able to see them in my results folder where I have set jasmine configuration.

[HTTP] ← GET /wd/hub/session/6b8effe9-2948-47ee-a336-3bb77485f2d5/screenshot - - ms - -
[HTTP]
[HTTP] ← GET /wd/hub/session/6b8effe9-2948-47ee-a336-3bb77485f2d5/screenshot - - ms - -

config.js

jasmine.getEnv().afterEach(function(done) {
            wdBrowser.context('WEBVIEW_io.ionic.starter').then(function () {
                browser.takeScreenshot().then(function (png) {
                    console.log('browser.takeScreenshot()');
                    allure.createAttachment('Screenshot', function () {
                        return new Buffer(png, 'base64');
                    }, 'image/png')();
                    done();
                });
            });
        });

Appium hangs after when the test is completed.
can anyone help me on this?