static AggregatedHttpResponse of(int statusCode) {
        return of(HttpStatus.valueOf(statusCode));
    }
Creates a new HTTP response.

@param statusCode the HTTP status code

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