provide API to get a callObject
I am new to cypress and working on end to end testing of video class. it is difficult to test whether messages receiving or what to do after messages received, because it is difficult to figure it out how to send messages with callObject.sendMessage(). Since cypress doesn't support multiple windows, there is no way to send message from owner to participant and test. if we get a callObject through an API then it would be easy to handle classes and assert them while testing.