@SuppressWarnings("checkstyle:OverloadMethodsDeclarationOrder")
    public boolean isContentAlwaysEmpty() {
        return isContentAlwaysEmpty(code);
    }
Returns {@code true} if the content of the response for this {@link HttpStatus} is expected to
be always empty (204, 205 and 304 responses.)

@see #isContentAlwaysEmpty(int)
core/src/main/java/com/linecorp/armeria/common/HttpStatus.java