@SuppressWarnings("checkstyle:OverloadMethodsDeclarationOrder")
    public static boolean isContentAlwaysEmpty(int statusCode) {
        switch (statusCode) {
            case /* NO_CONTENT */ 204:
            case /* RESET_CONTENT */ 205:
            case /* NOT_MODIFIED */ 304:
                return true;
        }
        return false;
    }
Returns {@code true} if the content of the response for the specified status code is expected to
be always empty (204, 205 and 304 responses.)
core/src/main/java/com/linecorp/armeria/common/HttpStatus.java