function frameParent() {
    return this.requestHandler.create({
        path: '/session/:sessionId/frame/parent',
        method: 'POST'
    });
}
Change focus to the parent context. If the current context is the top level browsing context,
the context remains unchanged.

@see  https://w3c.github.io/webdriver/webdriver-spec.html#switch-to-parent-frame
@type protocol