Access HTTP response headers in interceptor

I need to access HTTP response headers in interceptor in my angular(7) application. I have searched but what I have found is we can access on request level by passing

{observe: 'response'}

but in my case I need to keep track of specific header if I get it from server I will update my local storage else not.On debugging interceptors response headers I got these

any article or anything I can look more into it? thanks