@Override
    public HttpResponseBuilder header(CharSequence name, Object value) {
        return (HttpResponseBuilder) super.header(name, value);
    }
Adds a header to this response. For example:
<pre>{@code
HttpResponse.builder()
            .ok()
            .content("Hello, Armeria")
            .header("Server", "foo")
            .build();
}</pre>
core/src/main/java/com/linecorp/armeria/common/HttpResponseBuilder.java