static AggregatedHttpResponse of(ResponseHeaders headers) {
        requireNonNull(headers, "headers");
        return of(headers, HttpData.empty(), HttpHeaders.of());
    }
Creates a new HTTP response with empty content.

@param headers the HTTP headers

@throws IllegalArgumentException if the status of the specified {@link ResponseHeaders} is
                                 {@linkplain HttpStatus#isInformational() informational}.
core/src/main/java/com/linecorp/armeria/common/AggregatedHttpResponse.java