Order of `required` properties

[marceloverdijk]

https://github.com/swagger-api/swagger-core/blame/f728c95fd8d6d9153cdcc18043a15bd6ae0612e3/modules/swagger-models/src/main/java/io/swagger/v3/oas/models/media/Schema.java#L1211

For documentation readability it would be very convenient if the required properties of schema are the same of the order of properties in the schema itself. Unfortunately this is not the case and the required properties are always ordered alphabetically.

    public void setRequired(List<String> required) {
        List<String> list = new ArrayList<>();
        if (required != null) {
            for (String req : required) {
                if (this.properties == null || this.properties.containsKey(req)) {
                    list.add(req);
                }
            }
        }
        Collections.sort(list); // <==================== HERE!
        if (list.isEmpty()) {
            list = null;
        }
        this.required = list;
    }

What is the rationale behind this?